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or It39。He wants to move to France and marry the girl.The purpose of new technologies is to make life easier,not to make it more difficult.(12)不定式做表語時(shí),一般要帶to,但若主語部分中含有do的各種形式時(shí),符號(hào)to可省去。例如:They ought to e ):(2)使役動(dòng)詞let,have,make:(3)感官動(dòng)詞see,watch,look at,notice,observe,hear,listen to,smell,feel,find 等后作賓補(bǔ),省略to。當(dāng)動(dòng)詞與介詞連用時(shí),常位于“形容詞+動(dòng)詞不定式”結(jié)構(gòu)的末尾。①To be kind to the enemy is to be cruel to the people.②My chief purpose is to point out the difficulties of the matter.③What I would suggest is to put off the meeting.當(dāng)主語和表語都是不定式時(shí),其含義一是條件,一是結(jié)果(例①)。用禿頭不定式作賓語補(bǔ)足語的常用動(dòng)詞如下:口訣:“五看、三使役“,“兩聽、一感”要記住,若是“賓補(bǔ)”變“主補(bǔ)”,主補(bǔ)“to”字不能無。2) to + be 的不定式結(jié)構(gòu),作補(bǔ)語的動(dòng)詞。不定式decide,know,consider forget,learn,remember,show,understand,see,wonder,hear,find out,explain,tellPlease show us how to do that. 請(qǐng)演示給我們?nèi)绾稳プ?。Kind, nice, stupid, rude, clever, foolish, thoughtful, thoughtless, brave, considerate(考慮周到的), silly, selfish(自私的)例句:It was silly of us to believe him. 我們真愚蠢,竟然相信了他。(3)舉例(1) It39。It is stupid of you to write down everything (that) the teacher 。To make up for lost time is not 。I39。當(dāng)主語是動(dòng)作的發(fā)起者(或之一)時(shí),稱為主動(dòng)語態(tài);如果動(dòng)詞不定式的邏輯主語是這個(gè)不定式所表示的動(dòng)作的承受者,不定式一般要用被動(dòng)語態(tài)形式。一般為:動(dòng)詞+ to do sthHe seems to know this.I hope to see you again. = I hope that I39。如:①When we shall leave…③…h(huán)ow Icould learn……經(jīng)常在這種結(jié)構(gòu)中使用的動(dòng)詞有:consider,decide,discover,explain,find out,forget,hear,know,lea rn,observe,understand,wonder等。s our duty to take good care of the 。He will find it is hard to make 。s necessary for you to lock the car when you do not use ,鎖車是有必要的。(付得起),agree(同意),aim(力求做到),appear(顯得),arrange(安排),ask(要求),attempt (試圖),care(想要),choose(決定),claim(聲稱),condescend(屈尊),consent(準(zhǔn)許),decide(決定),demand(要求),determine(決心),endeavor(竭力),expect(期待),fail(未履行),help(幫助),hesitate(猶豫),hope(希望),learn(學(xué)會(huì)),manage(設(shè)法),neglect(疏忽),offer(主動(dòng)提出),plan(計(jì)劃),prepare(準(zhǔn)備),pretend(假裝),proceed(接著做),promise(答應(yīng)),prove(證明),refuse(拒絕),resolve(解決),seem(覺得好像),swear(發(fā)誓),tend(往往會(huì)),threaten(預(yù)示),undertake(承諾),volunteer(自愿做),vow(發(fā)誓),want(想要),wish(希望)舉例:The driver failed to see the other car in time.司機(jī)沒能及時(shí)看見另一輛車。3)當(dāng)復(fù)合賓語中的賓語是不定式時(shí),先用形式賓語it代替不定式,把不定式置于補(bǔ)語之后,即:主語+動(dòng)詞+it+補(bǔ)語+to do句式。有些動(dòng)詞需用as 短語做補(bǔ)語,如regard,think believe,take,consider.We regard Tom as our best teacher. 我們認(rèn)為湯姆是我們最好的老師。find后也可帶一個(gè)從句。(2)作結(jié)果狀語,表事先沒有預(yù)料到的,要放在句子后面。(4)不定式作定語時(shí),一般可轉(zhuǎn)換為定語從句,例①to arrive=that will arrive。(10)but作介詞,后接不定式結(jié)構(gòu)時(shí),前面謂語動(dòng)詞部分若含有do的形式時(shí),but后的不定式要省去to,否則要帶to。Go in quietly so as not to wake the ,別驚醒了嬰兒。s very nice of you to help me. 你來幫助我,你真是太好了。這箱子太重,恐怕你搬不動(dòng)。He was but too eager to get home. 他非常想回家。如:Don39。Don39。That department has ceased to exist 。go on doing 繼續(xù)做原來做的事。interested in doing 對(duì)某種想法感興趣,doing 通常為想法。(3) 在attempt,intend,begin,start 后接know,understand,realize這類動(dòng)詞時(shí),常用不定式todo。d love to.③Don39。用法①用于助動(dòng)詞之后He must be ing by 。It remains to be seen whether you are right. 你是否正確,以后見分曉。I’m sorry to have given you so much trouble. 對(duì)不起給了你這么多麻煩。句型用法在There be句型中的動(dòng)詞不定式:For example one,There are too much homework to write.two,There are students writing too much homework.To不定式在英語中不定式最常用于質(zhì)詞to之后, 例如在 to walk, to cry, to eat, to fear.這種用法叫做toinfinitive?!保?。To be or not to be ...To sleep, perchance to dream ...經(jīng)常跟在to后形成不定式的動(dòng)詞包括:例如:I arranged to stay the night. (我已安定好今晚留在這里。表示在某個(gè)給定的時(shí)間之前已完成的動(dòng)作I hope to have finished the work by now. 我希望現(xiàn)在以前已完成這項(xiàng)工作。不定式完成被動(dòng)式的用法不定式的完成被動(dòng)式表示發(fā)生在謂語動(dòng)作之前的被動(dòng)動(dòng)作:I’m pleased to have been given this opportunity. 給了我這次機(jī)會(huì)我很高興。t be reading a ,你應(yīng)該看課本。ll try not to.④Try to be back by 12,won39。我開始明白真相。(想了解)I39。Go on doing the other exercise after you have finished this ,接著做其他的練習(xí)be afraid doing/to dobe afraid to do 不敢,膽怯去做某事,是主觀上的原因不去做,意為“怕”;be afraid of doing 擔(dān)心出現(xiàn)doing的狀況、結(jié)果。try doing/to dotry to do 努力,企圖做某事?!?未做)regret doing 對(duì)做過的事遺憾、后悔?!?未做)forget doing 忘記做過某事。如:The enemy solders had no choice but to give in.On Sunday afternoon I had nothing to do but watch TV.區(qū)別聯(lián)系1 動(dòng)名詞與不定式的區(qū)別動(dòng)名詞表達(dá)的是:狀態(tài),性質(zhì),心境,抽象,經(jīng)常性,已發(fā)生的 不定式表達(dá)的是:目的,結(jié)果,原因,具體,一次性,將發(fā)生的2 接不定式或動(dòng)名詞,意義相同3在下列情況下,一般要用