高三英语知识点总结1

一、不定式做主语：

1、不定式做主语一般表示具体的某次动作。===动名词doing 表示习惯的，经常的动作。

e.g: To finish the building in a month is difficult.

To do such things is foolish.

To see is to believe. (对等)

注: 1). 不定式作主语时,谓语用单数

2). 当主语较长，谓语较短时，常用it做形式主语，而将不定式放到谓语的后面。

it做形式主语，不定式放在谓语动词之后常用于下列结构中：

(1)It is/was +adj.+of sb. to do…

(2) It is +adj.+for sb.+to do…

It is easy / difficult / hard / foolish / unwise / right / wrong / unnecessary

(3) it is +a +名词+ to do...

It is a pity / a pleasure / a pleasant thing / one’s duty / an honor / a shame / a crime / no easy job… to do

It takes (sb.) some time / courage / patience …to do…

It requires courage / patience / hard work… to do…

_注意: probable 和 possible 均可作表语，但possible可以用不定式作真实主语， 而probable不能用不定式作真实主语。

It is probable for him to come to the meeting.(错)

It is possible for him to come to the meeting.

It is possible / probable that he will come to the meeting.

二、不定式做表语

主语是以aim duty hope idea intention plan job suggestion wish purpose task 等为中心词的名词词组 或以 what 引导的名词性从句表示，后面的不定式说明其内容, 不定式作表语常表示将来或现在的动作或状态。

eg :My idea is to climb the mountain from the north.

Your mistake was not to write that letter.

What I would suggest is to start work at once.

三 、动词不定式作宾语

以不定式结构为宾语的动词有：

ask, agree, care, choose, demand, decide, expect, fail, help, hope, learn, manage, offer, plan, prepare, pretend, promise, refuse, want, wish等只能用动词不定式作宾语

口诀(接不定式作宾语的动词)

想要学习 早打算( want learn plan)

快准备 有希望( prepare hope wish expect)

同意否 供选择(agree offer choose)

决定了 已答应(decide be determined promise)

尽力去 着手做(manage undertake)

别拒绝 别假装(refuse pretend)

失败不是属于你(fail)

e.g.Tom refused to lend me his pen.

We hope to get there before dark.

The girl decided to do it herself.

高三英语知识点总结2

语法----被动语态

(一)概念：主动语态表示主语是动作的执行者，被动语态表示主语是动作的承受者。

(二)各种时态被动语态的形式

1.一般现在时的被动语态 am/is/are + done

2.一般过去时的被动语态 was/were + done

3.一般将来时的被动语态 ⑴will/shall be done ⑵be going to be done ⑶be to be done

4.现在进行时的被动语态 is/am/are + being + done

表示说话人说话时或现阶段正在进行的动作，经常和时间副词now (现在), right now (现在, 此刻), at present (现在,目前), at this moment (此刻)连用。

5.现在完成时的被动 have/has been done

现在完成时常与already, always, often, ever, never, yet, not...yet, just等不表示明确的时间副词连用, 还可以和表示时间一直延续到目前的带(ever )since, for的状语及包括现在在内的词连用。如: now, today, this month, this year, recently, these days，many times, so far, by now, in the past/last few days/years… 等。

6. 过去完成时的被动 had been done

7. 过去将来时的被动 would be done

8. 过去进行时的被动 was/were being done

9. 带情态动词的被动语态 情态动词 + be done

10. 动词不定式的被动式 to be done

高三英语知识点总结3

1. decrease减少,降低 decrease by 减少了decrease to减少到 increase by/to增加了/到

2. endangered animals濒临危险的动物 in danger of有?的危险;垂危out of danger脱离危险

3. die out 逐渐消失，灭绝(某一物种，也可指疾病、语言、社会习俗custom的灭绝，消失) die off(指一群人或动物等)相继死去 die away(声音，风，光线等)逐渐停止，逐渐消失 die down(火焰，风暴，激烈的情绪等)逐渐减弱，变小 4. in peace安详地，和平地

5. loss损失，丢失，遗失at a loss困惑不解;不知所措 6. in relief 如释重负

7. a nature reserve 自然保护区 a natural protection zone 自然保护区

8. be distant from…离…很远 in the distance在远处 9. be employed to work被雇来工作

10. long to do sth.渴望做某事 long for sth.想要… 11. respond to 回答，回应 response(n.)

12. turn around回转,转向 turn down减弱，降低;拒绝 turn up出现;露面;把声音开大 turn out关闭(煤气、自来水、电灯等);(常与to, that连用)结果 turn off 关闭，关掉 turn on 打开(煤气、自来水、电灯等) turn to sb. for help想某人求助

13. burst into laughter=burst out laughing突然笑了起来 burst in闯进，突然插嘴

burst into tears=burst out crying突然哭起来 burst into +名词=burst out +doing突然…起来

14. without mercy惨忍地 show mercy to对…同情/怜悯，可怜 at the mercy of听由…摆布

15. a certain number of一定数量的 certain 确定的;某一、某些;一定的

16. the importance of… 。。。的重要性 be of great/much importance 非常重要

17. protect …from…保护…不受…(危害) under the protection of在…的保护下

18. contain含有，包含;容纳;容忍 (事物在里面，或某事物由什么组成) include包括

19. pay attention to注意(to为介词，后跟名词、代词、形容词) Attention, please!请注意 Attract/draw/catch one’s attention 吸引某人的注意 fix one’s attention on集中注意力在…上

20. succeed in doing sth. 成功地做某事 success(n.)成功 successful(adj.)成功的

21. be concerned about对…关心 22. have a secure income有固定的收23. hunt for寻找，搜寻

24. do harm to 伤害，对…有害 do good to对…有好处 25. come into being出现，形成

26. appreciate (v.)欣赏，感激，意识到 appreciate+名词/代词/动名词

I would appreciate it if… 如果…我将不胜感激。 27. an unexpected incident一件意外事故

28. for sure确切地，无疑地 29. according to a UN report 根据联合国的一份报告

30. in the last 500 years 在过去500年里 31. a start and an ending开头和结尾