高三高考英语语法复习知识点总结一、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:Tofinishth下面是小编为大家整理的高三高考英语语法复习知识点总结4篇,供大家参考。
高三高考英语语法复习知识点总结篇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:Tofinishthebuildinginamonthisdifficult.
Todosuchthingsisfoolish.
Toseeistobelieve.(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)Itis/was+adj.+·
(2)Itis+adj.+forsb.+todo·
Itiseasy/difficult/hard/foolish/unwise/right/wrong/unnecessary
(3)itis+a+名词+todo...
Itisapity/apleasure/apleasantthing/one’sduty/anhonor/ashame/acrime/noeasyjob·todo
Ittakes(sb.)sometime/courage/patience·todo·
Itrequirescourage/patience/hardwork·todo·
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。
Itisprobableforhimtocometothemeeting.(错)
Itispossibleforhimtocometothemeeting.
Itispossible/probablethathewillcometothemeeting.
高三高考英语语法复习知识点总结篇2
用固定的情态动词表示的虚拟语气
1. should +动词原形(有时省略should)
(1)用在动词如advise, command, demand, desire, insist, order, propose, recommend, request, require, suggest, urge等后的宾语从句中。例如:
1)They requested that we (should) send a delegation to their country.
2)She urged that he write and accept the post.
(2)用在it is suggested, it is desired, it is required, it was ordered, it was proposed, it has been decided, it is necessary (essential, imperative, important, desirable) that等引出的主语从句中。例如:
1)It is desired that we (should) get everything ready by tonight.
2)It is necessary that the teacher (should) have a thorough knowledge of the subject he teaches.
(3)用在suggestion, motion, proposal, order, recommendation, plan, idea, requirement等引起的表语从句和同位语从句
例如:He put his coat over the child lest he should catch cold.
高三高考英语语法复习知识点总结篇3
条件状语从句
引导词:if(如果),...
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