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400字写神奇的四年级作文
在日复一日的学习、工作或生活中，大家都写过作文吧，作文是通过文字来表达一个主题意义的记叙方法。那么，怎么去写作文呢？下面是小编为大家整理的400字写神奇的四年级作文，仅供参考，欢迎大家阅读。
400字写神奇的四年级作文1
延续动词与瞬间动词
1)用于完成时的区别
延续动词表示经验、经历;瞬间动词表示行为的结果，不能与表示段的时间状语连用。 He has completed the work.他已完成了那项工作。 (表结果)
I've known him since then.我从那时起就认识他了。(表经历)
2)用于till / until从句的差异
延续动词用于肯定句，表示"做……直到……"瞬间动词用于否定句，表示"到……，才……" He didn't come back until ten o'clock.
他到10点才回来。
He slept until ten o'clock.
他一直睡到10点。
典型例题
1. You don't need to describe her. I ___ her several times.
A. had met B. have met C. met D. meet
答案B.首先本题后句强调对现在的影响，我知道她的模样，你不用描述。再次，several times告知为反复发生的.动作，因此用现在完成时。
2.---I'm sorry to keep you waiting.
---Oh, not at all. I ___ here only a few minutes.
A. have been B. had been C. was D. will be
答案A.等待的动作由过去开始，持续到现在，应用现在完成时。
用一般过去时代替完成时
1)两个动作如按顺序发生，又不强调先后，或用then，and，but等连词时，多用一般过去时。
When she saw the mouse，she screamed.
My aunt gave me a hat and I lost it.
2 )两个动作相继发生，可用一般过去时;如第一个动作需要若干时间完成，用过去完成时。 When I heard the news, I was very excited.
3)叙述历史事实，可不用过去完成时，而只用一般过去时。
Our teacher told us that Columbus discovered America in 1492.
400字写神奇的四年级作文2
一、现在分词和过去分词的构成(形式)
外教一对一一般式doing being done style="text-indent: 2em; text-align: left;">完成式having done having been done
过去分词的构成：done
二、过去分词的用法
过去分词一般表示完成的和被动的动作，只有一种形式。
过去分词用法如下：
1.作定语和现在分词作定语的用法相同。作定语用的过去分词如果是单词，一般放在名词的前面;如果是过去分词短语，要放在名词的后面。
2.作表语
3.作宾语补足语
4.作状语
三、现在分词的用法
1.作定语作定语用的分词如果是单词，一般放在名词的前面。如果是分词短语，一般放在名词的后面，它的功用相当于定语从句。
2.作表语
3.作宾语补足语分词在复合宾语中可作宾语补足语。可带这种复合宾语的动词有：see, watch, hear, feel, find, get, keep等。
高一英语语法知识
虚拟语气
虚拟语气也是一个难点。所谓虚拟语气是表示说话人的`愿望、假设、猜测或建议，而不表示客观存在的事实。它通过句子的谓语动词的特殊形式来表示。
现归纳如下：纯假设，用虚拟，动词时态退一级：条件句，分主从，主句谓语前加would (should,could，might);表愿望,用虚拟，wish后面接宾语(从句)：现在过去与将来，动词时态退一级：提建议，用虚拟，宾语(从句)动词用(should)do：俩建议，三要求，再加坚持与命令
(suggest,advise,demand,require,request,insist,order)：It is time和eoukd rather,后接丛句用虚拟：部分主语从句中，谓语用虚拟结构(It is necessry
/important/natural/natural/strange/strange that??should do)。下面举例说明：
A、If you came tomorrow,we would have the metting. (条件句虚拟)
B、Without air,there would be no living things.(同上)
C、We wish we had arrived there two hours earlier.(表示愿望虚拟)
D、He demanded that we (should)start right away.(表示建议虚拟)
E、It is(high)time that we left (should leave)now.(特殊从句虚拟)
F、I would rather you gave me the book.(同上)
G、It is necessary that we should clean the room everyday，(主语从句虚拟) H、He speaks English so fluently as if he were English. (特殊从句虚拟)
高一英语知识点
一、一般过去将来时
1.概念：立足于过去某一时刻，从过去看将来，常用于宾语从句中。
2.时间状语：The next day (morning, year…),the following month(week…),etc.
3.基本结构：主语+was/were +going to + do+其它;主语+would/should + do+其它
4.否定形式：主语+was/were+not + going to + do;主语+would/should + not + do.
5.一般疑问句：was或were放于句首;would/should提到句首。
6.例句：He said he would go to Beijing the next day.他说他第二天要去北京。
I asked who was going there.我问，谁要去那里。
二、现在进行时
1.概念：表示现阶段或说话时正在进行的动作及行为。
2.时间状语：Now, at this time, days, etc. look. listen
3.基本结构：主语+be +doing +其它
4.否定形式：主语+be +not +doing+其它
5.一般疑问句：把be动词放于句首。
6.例句：How are you feeling today?你今天感觉如何?
He is doing well in his lessons.在课上他表现得很好。
400字写神奇的四年级作文3
good to对……友好be good for对……有益;be bad to…/be bad for…
up加起来增加
add up to合计，总计
add…to把……加到……
…until/till意思是“直到…才”
sth/sb done使……完成/使某人被……
m down平静下来
concerned about关心，关注
7.当while,when,before,after等引导的时间状语从句中的主语与主句的主语一致时，可将从句中的主语和be动词省去。
While walking the dog,you were careless and it got loose.
at in the exam
through经历;度过;获准，通过
e away躲藏;隐藏
down写下，记下
12.I wonder if…我不知道是不是…
purpose故意
happen to sb某人发生某事
sb happen to do sth某人碰巧做某事
it so happened that……正巧碰巧
is the first(second…)that…(从句谓语动词用现在完成时)
one’s power处于……的控制之中
’s no pleasure doing…做…没有乐趣
It’s no good/use doing sth.做某事是没好处/没用的
found it difficult to settle and calm down in the hiding 做形式宾语
fer from患…病;遭受
…that…/such…thay…
tired of…对…感到劳累疲惫
e some trouble with sb/sth.在……上遇到了麻烦
along with sb/sth.与某人相处
(sb)for advice.(向某人)征求建议
e后接复合宾语，宾语补足语须用不带to的不定式、形容词、过去分词、名词等。常见的'有以下几种形式:
make sth.让(使)某人做某事
make sb./sth.+adj.使某人/物…
make sb./oneself+v-ed让某人/自己被…
When you speak,you should make yourself understood.
make sb.+n.使某人成为…
ne /lonely.单独的/孤独的
26.I would be grateful if…委婉客气提出请求
not do…=why don’t you do…
400字写神奇的四年级作文4
1. know of /about 了解,知道关于 2. leave work 下班
3. make great achievements 取得巨大进步 4. even if/though 即使,甚至
5. in sight /out of sight /lose sight of 6. make sense (of ) 知道,了解;有意义
7. watch out (for)注意,小心/ on watch 站岗 8. be frozen with/by被..惊呆
9. wish (for) sb to do 希望去做 10. pay back / off /for
11. be linked to / be related to 和有关 12. hold sb. still 使.一动不动
13. make the best(most) of /make full use of 14. breathe in吸进/take in吸进;理解,吸收
15. cant help doing /to do
17. warm (sb.)up 18. all of a sudden
19. make progress 20. bang into撞上
22. glance at /stare ( up ) at /glare at 23. set off(for/towards) 起程或出发去
24. second to none 最好 32. reach out for sth 伸手去够
33. rest on/upon sth 搭在上 34. be grateful to sb for sth 由于..感激.
35. have .in common 36. match A with B
37. in some cases在某些情况下 38. look up to 敬仰.
39. make ones way to 前进,去 40. compared to /with
41.feed on(upon) /feedwith 42. focus on /upon
43.take turns to do / (at) doing 44.in panic 害怕的,恐惧的'
45.die of /from 46.speak /think highly of sb.
47. be related/linked to 和有关 48. have .to do with
50. rather than而不是 51. turn down 把(音量)调小;拒绝
52. turn around环顾四周 53. in the distance 在远处
54. be known as/for/to
400字写神奇的四年级作文5
survey 调查;测验
add up 合计
upset adj.心烦意乱的;不安的;不适的 vt.使不安;使心烦。
ignore 不理睬，忽视
calm vt.vi(使)平静;(使)镇定 adj.平静的;镇静的;沉着的
calm (…)down (使)平静下来;(使)镇静下来
have got to 不得不;必须
concern (使)担忧;涉及;关系
be concerned about 关心;挂念
walk the dog 遛狗
loose 松的;松开的
vet 兽医
go through 经历;经受
Amsterdam 阿姆斯特丹(荷兰首都)
Netherlands 荷兰(荷兰国家)
Jewish 犹太人;犹太族的
German 德国的;德国人的;德语的;德国人;德语
Nazi n.纳粹党人adj.纳粹党的
set down 记下;放下;登记
series 连续;系列
a series of 一连串的;一系列;一套
outdoors 在户外;在野外
spellbinding 迷住;迷惑
on purpose 故意
in order to 为了…
dusk 黄昏;傍晚
at dusk 在黄昏时刻
thunder v打雷;雷鸣;n雷;雷声
entire 整个的;完全的;全部的
entirely 完全地;全然地;整个地
power 能力;力量;权力
face to face 面对面地
curtain 窗帘;门帘;幕布
dusty 积满灰尘的.
no longer ot…any longer 不再
partner 伙伴;合作者;合伙人
settle 安家;定居;停留 使定居;安排;解决
suffer 遭受;忍受;经历
suffer from 遭受;患病
loneliness 孤单;寂寞
highway 公路;大路;<美>高速公路
recover 痊愈;恢复;重新获得
gete tired of 对…厌烦
pack 捆扎;包装;打行李 小包;包裹
pack(sth)up 将(东西)装箱打包
suitcase 手提箱;衣箱
overcoat 大衣;外套
teenager 十几岁的青少年
get along with 与…相处;发展
gossip 闲话;闲谈
fall in love 相爱 爱上
exactly 确实如此;正式;确切地
disagree 不同意
grateful 感激的;表示谢意的
dislike 不喜欢;厌恶
join in 参加;加入
tip n.揭示;技巧;尖;尖端;消费 vt. 倾斜; 翻到
secondly 第二;其次
swap 交换
item 项目;条款
400字写神奇的四年级作文6
核心单词
1、 persuade
vt。说服；劝服；使相信（同convince）
常用结构：
persuade sb。 of sth。使某人相信某事
persuade sb。 to do sth。说服某人做某事
persuade sb。 into doing sth。说服某人做某事
persuade sb。 out of doing sth。说服某人不要做某事
persuade sb。 that—clause使某人相信……
联想拓展
talk sb。 into/out of doing sth。=reason sb。 into/out of doing sth。
说服某人做/不做某事
trick sb。 into/out of doing sth。诱使某人做/不做某事
urge sb。 into/out of doing sth。怂恿某人做/不做某事
易混辨析
advise/persuade
advise强调"劝告，建议"的'动作，不注重结果；而persuade强调"已经说服"，重在结果。用法上：advise可跟v。—ing形式作宾语，也可以接that—clause （that sb。 should do），而persuade则不能。
I persuaded him of its truth。我使他相信这是真的。
We will persuade him to take the medicine。
我们将说服他把药吃下去。
We persuaded her into taking the job。
我们说服她接受了这份工作。
I persuaded my father out of smoking。
我劝服父亲戒了烟。
400字写神奇的四年级作文7
重点单词讲解。
(1)add
① add …to…把…添加…/把…加起来
② add up to共计，总共
③ add to增添
(2)upset
过去式：upset过去分词：upset现在分词：upsetting
adj.心烦意乱的，不安的，不适的
be upset about/over为某事心烦、不安
be upset that心烦
vt.使不安，使心烦
It upsets sb that让某人心烦的是
It upsets sb to do sth做某事使某人不安
(3)concern
vt.使担心，顾虑，涉及，关系到
n.担心，关注，利害关系
①as far as sb/sth + be concerned就某人而言，对于某人来说
as far as I am concerned就我而言，对于我来说
as far as he is concerned对他来说
as far as English is concerned关于英语，对于英语
②be concerned about/for关心，挂念
have no concerned about/for
③be concerned in/with涉及到，与…有关
have no concerned in/with
(4)go through
①经历，遭受，忍受go through one difficulty after another.经历一个又一个困难。
②仔细检查，审查go through your paper检查你的试卷。
③浏览，翻阅go through all the related reference.浏览相关资料。
④通过，穿过=pass through go through a great forest.穿过一片大森林。
⑤完成go through the task.完成任务。
(5)suffer
①suffer作“遭受”时，后面直接接pain, loss, injury, harm或punishment.
②suffer作“受…苦”时，常常搭配：suffer from
(6)get/be tired of厌烦…
get/be/feel tired of sb / sth / doing sth厌烦
be tired from由于…而疲劳(体力上的疲劳)，侧重原因
be tired out精疲力竭的
(7)join in参加，加入
区别join ,join in ,attend与take part in：
join：多指加入组织，团体，党派等，有作为其中一员的意思。例：join the army参军
join in：参加某项游戏，活动，讨论等。常用结构：join sb in
例：Will you join us in a walk?
attend：参加会议，婚礼，葬礼，上课，讲座，听报告等。
例：attend a lecture参加一个讲座。
take part in：多指参加群众性的活动，运动，战争等。
例：take part in the march.
虚拟条件句
条件状语从句是非真实情况，在这种情况下要用虚拟语气。
l-条件从句与现在事实不一致，句型为：If+主语十过去时，tiag+should (could，would，或might)+动词原形，例如：If l were you，1 would study hard.
2.条件从句与过去事实不一致，句型为：If+主语+had+过去分词，主语+should(could, would，或might)+have+过去分词，例如：If I had not studied hard.1would have failed in the exam last term
3.条件从句与将来事实不一致，句型为：lf+主语+should/were to+do，主语+should( could.)+原形do，例如：If l were to go to the moon one day,I could see itwith my own eyes.
注意：
1.If条件句中绝对不可出现“would”。
2-根据句中的时间状语，有时可能出现“混合虚拟”的情况，即主句可能是现在的'情况，条件句也许是发生在过去的情况，但都遵守上述句型。
3.在条件句中如果出现were，had，should可省去if'
将这些词提前置于句首构成倒装，例如：w。re I to go tothe moon one clay,1 would see it with my own eyes.如果有一天我登上月球，我就可以亲眼目睹它的样子了。
直接引语和间接引语
(一)直接引述别人的原话，叫做直接引语;用自己话转述别人的话，叫做间接引语。间接引语一般构成宾语从句。直接引语必须放在引号内，间接引语则不用引号。直接引语改为间接引语时，除将引语部分变成宾语从句外，还必须对直接引语中的人称、时态、指示代词、时间状语、地点状语等进行改变。
1.时态的变化：直接引语变为间接引语时，通常受转述动词said, asked等的影响而使用过去化的时态，即把原来的时态向过去推，也就是一般现在时变为一般过去时，现在进行时变为过去进行时，等等。例如：
Tom said to me,“My brother is doing his homework.”
→Tom said to me that his brother was doing his homework.
2.人称代词、指示代词、时间状语、地点状语等等的变化：根据意义进行相应的变化，例如：
She asked Jack,“Where have you been?”
→She asked Jack where he had been.
He said,“These books are mine.”
→He said that those books were his.
(二)直接引语改为间接引语时，都使用陈述语序，但是因为原句的句式不同，所以变成间接引语时所用的连词会有所不同。直接引语如果是一般疑问句，用连接词whether或if;如果是特殊疑问句，则用疑问词引导间接引语。转述的动词一般用asked，可以在其后加上一个间接宾语me, him, her, us等。如：
She said,“Is your father at home?”
→She asked me if/whether my father was at home.
“What do you do every Sunday?”My friend asked me.
→My friend asked me what I did every Sunday.
直接引语如果是祈使句，改为间接引语时，要将祈使句的动词原形变为带to的不定式，并在不定式的前面根据原句的语气(即请求或命令)加上ask, tell, order等动词，如果祈使句为否定式，则在不定式前加not。其句型为：ask / tell / order someone (not) to do something.例如：
She said to us,“Please sit down.”
→She asked us to sit down.
He said to him,“Go away!”
→He ordered him to go away.
He said, “Don’t make so much noise, boys.”
→He told the boys not to make so much noise.
raise vt.“使……上升;升起;提高”等;
rise vi.“上升;升起”;
arise vi.“站起来(stand up)”，“起床(get up)”
rise和arise用作站起，起床都属正式用法;arise主要表示“出现、发生”等意思。
She raised her voice in anger. (抬高)
The wind raised the fallen leaves from the ground. (刮起)
The child rose from the ground and ran to his mother. (=The child raised himself from the ground and ran to his mother.) (爬起)
She rises before it is light. (起床)
Difficulties will arise as we do the work. (出现)
重点短句
1. be good to对......友好be good for对......有益;be bad to…/be bad for…
2. add up加起来增加add up to合计，总计
add… to把......加到......
3. not…until/till意思是“直到…才”
4. get sth/sb done使......完成/使某人被......
5. calm down平静下来
6. be concerned about关心关注
7.当while, when, before, after等引导的时间状语从句中的主语与主句的主语一致时，可将从句中的主语和be动词省去。
While walking the dog, you were careless and it got loose.
8. cheat in the exam考试作弊
9. go through经历;度过;获准，通过
10. hide away躲藏;隐藏1
1. set down写下，记下
12. I wonder if…..我不知道是不是…. 12. on purpose故意
13. sth happen to sb某人发生某事
sb happen to do sth某人碰巧做某事it so happened that ......正巧碰巧
14. It is the first (second…) that… (从句谓语动词用现在完成时)
15. in one’s power处于......的控制之中
16. It’s no pleasure doing….做…..没有乐趣
It’s no good/ use doing sth.做某事是没好处/没用的
17. She found it difficult to settle and calm down in the hiding place. it做形式宾语
18. suffer from患…病;遭受19. so…that… /such…thay…
20. get tired of….对…感到劳累疲惫
21. have some trouble with sb/sth.在......上遇到了麻烦22. get along with sb/sth.与某人相处
23. ask(sb)for advice. (向某人)征求建议
24. make后接复合宾语，宾语补足语须用不带to的不定式、形容词、过去分词、名词等。常见的有以下几种形式:
make sb. do sth.让(使)某人做某事make sb. /sth. +adj.使某人/物…
make sb./ oneself +v-ed让某人/自己被…
When you speak, you should make yourself understood. make sb.+n.使某人成为…
25. alone /lonely.单独的/孤独的
400字写神奇的四年级作文8
1. What would you like to see happen in the future.
2. Not only is every step of climbing Mount Qomolangma felt by viewer, but also the cold, the tiredness, the food, the smells, the sights and the sounds of the mountain can all be experience.
3. Upon reaching the top of the mountain, a feeling of happiness and a sense of achievement will be experienced.
4. RealCine works by making the viewers feel that they are actually in the film.
5. The movements of the headset indicate the direction in which the view wants to go.
6. In scientific studies it has been shown that VR can provide teenagers with another way to experience the world and make them work harder to make their dreams come true.
7.The teenager was made to think that he had scored the winning goal.
8. An argument has been put forward that some viewers will be disappointed by Realcine.
9. Firefighters could be trained using Realcine without the risk of sending them into a burining building.
10. It has been suggested that travel sickness should/can be reduced by using virtual reality.
11. This could be of great benefit to people and will be researched further.
12. Also, we need to buy new keyboards and mousse because many of the keyboards have letters missing.
13. If the PC (No.7) I was using had had a good keyboard, I would not have made so many mistakes.
14. He left university in order to concentrate on the writing.
15. The teacher wont mind you using the computer.
16. The Time Traveller journeys through millions of years, seeing even more alien creatures than before.
17. He finally stops thirty million years into the future and experiences a future time where the sun no longer shine brightly.
18. Scared and cold, the Time Traveller starts back towards the present.
19. Instead of waiting to be rescued, the three young people teach themselves astrophysics.
20. With the help of force from a black hole, the are able to guide the lost spaceship safely back to the Earth.
400字写神奇的四年级作文9
can't help doing sth.
can't help doing sth.禁不住做某事，不由得不做某事
She couldn't hep smiling.
[比较]
(1) can't help but do不得不……;不能不
When the streets are full of melting snow, you can't help but get your shoes wet.
(2) cannot but不能不，只能
He could not but feel disappointed.
[归纳]
(1) help (sb.) (to) do sth. Help me get him back to bed at once.
By helping them we are helping save ourselves.
(2) help...with sth.帮助……做某事
In those days he used to help her mother with her gardening.
(3) help oneself / sb. to sth.给自己/别人夹菜/拿烟等;擅自拿用
May I help you to some more vegetables?
(4) help...in sth.在……方面帮助某人
She offered to help Rose in the housekeeping when I am not here.
(5) help out帮忙(做事;克服困难等)
I've often helped Bob out when he's been a bit short of money.
400字写神奇的四年级作文10
定冠词的用法
1.表示特定的人或物
2.表示地球、宇宙中独一无二的事物，主要指各种天体及世界上比较有影响的物体。
The sun，the moon，the earth
3.表示地点、方向、时间、方式等 at the corner 在拐角处
1) 在表示季节的名词前常不用冠词。 In spring 在春天
2) 具体某年的某个季节，需用冠词。
In the summer of the year20xx
3)用于序数词或形容词的.级前 the first the second
4)用于形容词前使其名词化 the rich the poor
5)用于复数姓氏前，表示夫妇‖或全家 The Smiths
6)用于乐器名词前 Play the piano
400字写神奇的四年级作文11
1) from now/today/then/that time on自现在起/今天/那时/那时起
2) go by经过，依照，作为指南
3) go by sb/the law从某人旁边经过/遵守法律
4) let a chance go by放过机会
5) (time) go by (时光)流逝
6) go after/go over/go out追求/检查/熄灭
7) go all out/ go in for全力以赴/从事，酷爱
8) go through遭受
9) as a result结果，因此
10) as a result of作为的结果
11) with the result that结果是，因此
12) without result毫无结果
13) result from = lie in因引起
14) achieve ones goal实现某人的目
15) set a goal设定一个目标
16) a personal call亲自访问
17) ones personal view某人的个人观点
18) personally speaking就个人而言
19) in a way = in one way在某种程度上
20) in no way一点也不，决不
21) in the/ones way挡道的，妨碍人的
22) all the way一直，自始至终
23) on the/ones way接近，在进行中，在路上
24) by the way顺便说
25) in this way用这种方式
26) in any way在任何方面
27) lead the way带路，引路
28) lose ones way迷路
29) make ones way前往，去
30) arise from/out of sth因某事物而产生
31) deal with处理，安排，与做买卖
32) do with处置，处理，利用
33) watch over看守，监守
34) watch out小心，当心
35) on watch值班
36) in ones opinion以某人的.观点
37) with the help of在的帮助下
38) traffic signals交通信号灯
39) sothat如此以至于
40) human race人类
41) later on后来
42) be filled with充满，填满
43) get together聚会
44) make up编造
45) common sense常识
46) have sth in common with与有共同之处
47) to ones advantage对某人有利
48) consider sb as/to be考虑做为
49) consider doing sth考虑做某事
50) as time went by随着时间的推移
51) = with time going by
52) help sb with sth在某方面帮助某人
53) provide sb with sth把某物提供给某人
54) play against对抗
55) spoil ones free time破坏某人的空闲时间
56) mop the floors拖地
400字写神奇的四年级作文12
1) decrease fromto从减少到
2) decrease to减少到
3) decrease by + %减少了百分之
4) die out灭亡
5) die of/from因而死(内因of，外因from)
6) die away (声音，风等)逐渐消失，停息
7) die off先后死去
8) in danger (of)在危险中
9) out of danger脱险
10) burst into突然迸发
11) burst out doing突然做某事
12) eg: burst into laughter =burst out laughing
13) protectfrom保护不受(危害)
14) protect sb from doing sth阻止某人做某事
15) protectfrom/against防止
16) stop sb from doing sth阻止某人做某事
17) have an effect on对产生影响
18) have no effect on对没有影响
19) come into effect开始生效
20) succeed in doing sth成功地做某事
21) out of employ失业
22) employ oneself in忙于，从事
23) do harm to对有害
24) mean no harm没有恶意
25) according to根据，视而定
26) long before早在之前很久
27) before long不久以后
28) = soon after/shortly after (与将来,过去连用)
29) come into being产生，诞生，成立
30) = come into existence = come into force
31) bringinto being使生产，使形成
32) come into power开始执政，上台
33) come into effect生效
34) come into fashion开始流行
35) for sure一定要，必须，必然，肯定的
36) be sure of doing sth主自己对做某事有把握
37) be sure to do sth肯定会做某事(以旁观者)
38) be sure of确信，保证
39) be sure (that)确信(that常省略)
40) be/feel sure about对有把握
41) make sure of确保，确定
42) make sure (that)确实，证实
43) be not sure whether/when/where/what/why
不确定是否/何时/哪里/什么/为何
44) so that结果，以至于，为了
45) sothat如此以至于
46) in peace和平地
47) in relief如释重负
48) pay attention to注意
49) show mercy to对表示怜悯
50) economic loss经济损失
51) sell at a loss亏本出售
52) long to do sth渴望做某事
53) endangered species濒危物种
54) fly away飞走
55) a certain number of一定数量的
56) run after追赶
57) improve the environment改善环境
58) lose ones chance失去机会
59) tens of millions of years ago好几百万年前
60) as black as night漆黑一片
61) as bold as a lion勇猛如狮
62) as hard as a stone铁石心肠
63) as strong as a horse健壮如牛
400字写神奇的.四年级作文13
倒装结构的用法：
一、副词here,there, in, out,up ,down, away,back,now, then, ahead等位于句首,当谓语动词是be,come, go, follow,run等表示位置移动的动词，而且主语又是名词时,需要把谓语动词放主语之前，即全部倒装。
注意:A此类倒装不用进行时态度。B若主语是代词时，不用倒装。
二，含有否定意义的词放句首，部分倒装。
A具有否定意义的副词放句首：not,never,seldom,hardly, rarely.little,scarely,few…
B,含有否定意义的连词放句首:not only…but also.., neither..nor.., no sooner…than.., scarely..than..,Hardly..when.., not until…
_ot only, no sooner,hardly.scarely要倒,but (also), than, when后面的句子不倒. neither..nor..两部分都倒装。
C,含有否定意义的介词放句首：by no means, In no time,in no case, on no account,under no circumstances…
三，only+状语，部分到装
四、表示上文的状况也适合另外一人或事半功倍有下列：
肯定:so+助动词(动/情态)+主语_语与上文一致
否定:neither(nor)+助动(动/情态)+主语
五、as作“尽管/虽然”，引导让步状语从句，由于语法需要，把表语/状语/动词提于句首.
六、so ..that.., such ..that..的句子结构中，若so,such和与其所修饰的词置于句首，实行部分倒。
七、若if引导的`虚拟条件句中有were, had, should时，可将if省，把were, had , should放主语之前。
八、充当地点状语的介词短语放句首，全倒。
九、在表示愿望的感叹句，倒装。
十、There be句型。
3.语法
详见Unit4的语法知识
400字写神奇的四年级作文14
一般过去时
should+ 动词原形
were+ 不定式 would + 动词原形
should+ 动词原形
If you succeeded, everything would be all right.
If you should succeed, everything would be all right.
If you were to succeed, everything would be all right.
混合条件句
主句与从句的动作发生在不同的时间，这时主，从句谓语动词的虚拟语气形式因时间不同而不同，这叫做混合条件句。
If you had asked him yesterday, you would know what to do now.
(从句与过去事实相反，主句与现在事实相反。)
If it had rained last night (过去), it would be very cold today (现在).
400字写神奇的`四年级作文15
1、common
表示"普通的,常见的;共同的;共有的;一般的"。
作名词，表示"(公有)草地"。
becommonknowledge人所共知。
thecommontouch平易近人的`美德commonground共同的意见,利益,目标等
commonsense常识，情理区别common，ordinary,usual,general,normal
common指因许多事物或许多人所共同具有而常见的意思。
ordinary指由于与一般事物性质和标准相同,因而显得平常,无奇特之处。
usual"通常的,惯常的",含有"随集体风俗或个人习惯而常常发生"之意。
normal意为"正常的",强调正常性。
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