2019年高考一轮复习英语知识点：短语句型(3)

　　1). Should he act like that again, he would be fined.    If he should act like that again, ……

　　Were he to act like that again, he would be fined.   If he were to act like that again, ……

　　***If he acted like that again, ……（不可以倒装）

　　2). Had the doctor come in time last night, the boy would have been saved.

　　If the doctor had come in time last night, ………..

　　3). If I had time now, I would go to the film with you. （不可以倒装,因为句中的had不是助动词）

　　But for….--> If it were not for…../ If it hadn't been for

　　1). But for the determined captain, all the passengers on board wouldn't have been saved.

　　If it hadn't been for the determined captain, all the passengers on board……

　　2). But for your rich parents, you wouldn't live such a easy life.

　　If it were not for your rich parents, you wouldn't live such a easy life.

　　再suggest, insist, demand, require, request, order, advise, propose等表示建议、要求、命令、主张的动词引导的名词性从句中，从句的谓语动词要用(should )do的形式

　　1). Mother insisted that John (should) go to bed before 9 o'olock.

　　对比：He insisted that I had taken away his dictionary.（不是建议、要求、命令或主张）

　　2). His suggestion that Tony (should) be invited to the party was refused.（同位语从句）

　　对比：His words suggested that he was very angry with me.（不是建议、要求、命令或主张）

　　58. taste, smell, look, sound, feel等感官动词作为系动词后面要接adj.作表语。

　　1). Apple of this kind taste very nice.

　　2). Smelling nice, this kind of bread sells well.

　　59.有些动词常用作不及物动词与well或easily连用，表示某物具备的某种特征。常用的词有sell, cut , wash, last, burn等。

　　1).His latest work sells well

　　2). Dry wood burns easily.

　　60.否定词与比较级连用，表达最高级的含义

　　1).I have never seen a better film.

　　2).I can't agree you more. 我非常同意

　　61.替代句型：英语中为了避免重复，在比较从句中常用一些替代词来代替前文出现过的词。

　　用助动词代替主句中的有关动词：

　　1). I earn more than I did in the past.

　　2). John spends as much time watching TV as he does writing.

　　3). China is no longer what it was/ used to be.

　　拥代词代替前文出现过的有关名词：

　　that  代替指物的单数可数名词或抽象不可数名词，一般是特指的

　　those 代替指人或指物的复数名词，一般是特指的=the ones

　　one   代替指人或指物的单数可数名词，一般是泛指的

　　ones  代替指人或指物的复数名词，一般是泛指的

　　1). The output of coal this year is twice as much as that of last year.

　　2). The students in this class are more active than those in that one.

　　3). A bridge made of steel is stronger than one made of stones.

　　4). Small bananas usually taste better than bigger ones.

　　动词不定式、动名词用法要点讲解

　　文章来源：教育热点论文网 文章编辑：EduHot 发布时间：2006-04-13

　　⒈不定式作主语

　　动词不定式作主语时，句子的谓语动词常用单数，其位置有以下两种：

　　(1)把不定式置于句首。如：

　　To get there by bike will take us half an hour.

　　(2)用it作形式主语，把真正的主语不定式置于句后，常用于下列句式中。如：

　　①It＋be＋名词＋to do

　　It's our duty to take good care of the old.

　　②It takes sb+some time+to do

　　How long did it take you to finish the work?

　　③It＋be＋形容词＋for sb＋to do

　　It is difficult for us to finish writing the compositionin a quarter of an hour.

　　④It＋be＋形容词＋of sb＋to do

　　It is stupid of you to write down everything the teachersays.

　　⑤It seems(appears)＋形容词＋to do

　　It seemed impossible to save money.

　　在句型③中，常用表示客观情况的形容词，如：difficult,easy,hard,important,impossible,necessary 等；在句型④中，常用careless,clever,good,foolish,honest,kind,lazy,nice,right,silly,stupid,wise等 表示赞扬或批评的词。在不定式前的sb，可看作其逻辑主语。这一句式有时相当于Sb is＋形容词＋to do句式 ，如：It'skind of you to help me with my English.=You are kind to helpme with my English.

　　⒉动名词作主语

　　Learning without practice is no good.

　　动名词作主语时，也常用It句式。如：

　　①It's +no good(no use,fun,a pleasure,a waste of time)+doing…

　　It's no good reading in dim light.

　　It's no use sitting here waiting.

　　②It's＋形容词＋doing

　　It's dangerous swimming in the sea in windy days.

　　这样用的形容词有expensive,nice,tiring等，但important,necessary则不适用于这种结构，应用不定式 代替，如：It'simportant for you to keep fit.

　　③There is no+doing

　　There is no saying what will happen next.

　　在这一结构中，动名词后常带宾语，相当于"It's impossible to…"结构。

　　⒊动词不定式和动名词作主语的区别

　　①不定式作主语经常表示具体动作，常与特定的动作执行者联系在一起；而动名词作主语经常表示抽象动 作，经常不与特定的动作执行者联系在一起。如：

　　It's no good eating too much fat.

　　It's no good for you to eat so much fat.

　　②动名词结构作主语，可以用名词或代词属格形式作逻辑主语。如：

　　It's no use your pretending that you didn't know the rules.

　　二、作宾语

　　⒈不定式作宾语

　　①以下动词后，只能跟不定式作宾语。如：agree,ask,aim,arrange,choose,decide,demand,expect,fail ,help,hope,lean,long,

　　manage,offer,plan,prepare,pretend,promise,refuse,wish等，这些词大部分可接th at引导的从句。如：

　　I decided to ask for my money back.

　　I decided that I would ask for my money back.

　　When our visit to the farm was over,we expected to startback on foot.

　　When our visit to the farm was over, we expected that wewould start back on foot.

　　②当复合宾语中的宾语是不定式时，先用形式宾语it代替不定式，把不定式置于补语之后，即：主语＋动 词＋it＋补语＋to do句式。如：

　　We think it quite important for us to learn a foreignlanguage well.

　　He feels it his duty to help the poor.

　　③介词but,except,besides+to do(do)

　　在这种句型中，如介词前有动词do，后面应接不带to的不定式；如无do，则接to不定式，即带do不带to， 带to不带do。如：

　　The enemy soldiers had no choice but to give in.

　　On Sunday afternoon I had nothing to do but watch TV.

　　⒉动名词作宾语

　　①以下动词后，只能接动名词作宾语，如：admit,appreciate,consider,delay,enjoy,finish,keep,imag ine,mind,miss,practise,resist,risk,save,suggest,don't mind,give up,insist,on, put off等。如：

　　I suggest spending our summer vacation in a seaside town.

　　You must give up smoking, for it does too much harm toyour health.

　　②动名词作介词的宾语

　　I should go to attend the birthday celebration instead of staying at home.

　　What about inviting Li Jun to make a speech?

　　动名词前的介词有时可以省略，如：have difficulty(in)doing,have no trouble(in)doing,lose no ti me(in)doing,prevent/stop…(from)doing,there is no use(in)doing等。

　　⒊部分动词后面，既可接动词不定式，也可接动名词作宾语，意义不变。如：begin,continue,start,hat e,like,love,need,require,want等。

　　在need,require,want后接-ing形式，表示被动意义，也可接不定式，但要用被动形式，如：Your handwr iting needs improving(tobe improved). hate,love,like接不定式表示特定的未来事件，接动名词表示目前 正在进行的活动或一般的行为。

　　在下列情况下，一般要用不定式：

　　①hate,like,love前有would(should)时，如：I'd like to have a cup of coffee.

　　②当谓语动词begin,continue,start等是进行式时，如：Thestudents are starting to work on the di fficult maths problem.

　　③begin,continue,start与know,understand等状态动词连用时，如：I soon began to understand what

　　was happening.

　　⒋advise,allow,encourage,forbid,permit等动词后接动名词作宾语，或带不定式作宾语补足语。如：

　　Our teachers don't permit our swimming in the lake.

　　Our teachers don't permit us to swim in the lake.

　　⒌部分动词后接不定式或动名词时，意义差别较大，应根据句子语境选择使用。

　　①forget,remember,regret后接不定式，表示现在或未来的动作，接动名词表示动作已经发生。如：

　　Don't forget fo post the letter for me.

　　Have you forgotten meeting her in Beijing Airport?

　　Remember to close the windows before you leave.

　　I remember writing him a letter a year ago.

　　We regret to tell you that all of you are not invited toattend the meeting.

　　They regretted ordering these books from abroad.

　　②mean to do 打算做某事

　　doing 意味着……

　　I meant to catch up with the early bus.

　　This means wasting a lot of money.

　　③try to do 设法尽力做某事

　　doing 试着做某事

　　You should try to overcome your shortcomings.

　　Try working out the physics problem in another way.

　　④stop to do 停下一件事去做另一件事（不定式作目的状语）

　　doing 停止做某事

　　On the way to the airport,I stopped to buy a paper.

　　You'd better stop arguing and do as you are told.

　　⑤can't help doing 禁不住……

　　to do不能帮助干……

　　They couldn't help jumping up at the news.

　　Sorry I have lots of work to do.So I can't help to make up the room for you.

　　⑥go on to do 做不同的事或不同内容的事

　　doing 继续不停地做某事，指同一动作的继续

　　He went on to talk about world situation.他接着又谈了世界形势。

　　We'll go on fighting so long as there is oppression inthe world.

　　⑦leave off to do 离开某地去干什么（目的状语）

　　doing停下某事

　　It's time to leave off talking and to start acting.

　　They left off to go fishing.

　　三、做表语

　　不定式作表语表示具体动作或将来动作；动名词作表语表示抽象的一般行为。

　　①To be kind to the enemy is to be cruel to the people.

　　②My chief purpose is to point out the difficulties ofthe matter.

　　③What I would suggest is to put off the meeting.