【正文】 　　二、表示在某個給定的時間之前已完成的動作： 　　I hope to have finished the work by now. 我希望現(xiàn)在以前已完成這項工作。如： 　　He was happy to be ing home. 就要回家了他感到高興。 　　I’m happy to meet you at last. 我很高興我終于碰到了你。 　　I should like to give him a chance. 我愿意給他一個機會。 　　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，一般要帶to，但若主語部分中含有do的各種形式時，符號to可省去。 　　2）The missing boy was last seen ___ near the river.　 　　A. playing　B. to be playing　C. play　D. to play 　　答案A. 本題強調(diào)其動作，正在河邊玩，應(yīng)此用see sb. doing sth句型。 　　我開始生起氣來。 　　.9 be interested doing/to do 　　interested to do　對做某事感興趣，想了解某事。 　　7 go on doing/to do 　　go on to do　做了一件事后，接著做另一件事。 　　cease doing　短時停止做某事，以后還會接著做?！?已做) 　　I regret to have to do this, but I have no choice. 　　我很遺憾必須這樣去做，我實在沒有辦法。 　　典型例題 　　She reached the top of the hill and stopped ___　on a big rock by the 　　side of the path.　 　　A. to have rested　B. resting　C. to rest　D. rest 　　答案：C。t forget to e tomorrow. 　　別忘了明天來。m only too pleased to be able to help you. 我非常高興能幫助你。m afraid the box is too heavy for you to carry it, but thank you all the same.　不用了。 　　It39。 　　Tom kept quiet about the accident so as not to lose his job. 　　湯姆對事故保持沉默是為了不丟掉他的工作。 　?。ɡ埽㎡ur work is serving the people. 　　（例⑤）What he likes is taking a walk after supper. 　?。ɡ蓿㏕he story told by is interesting. 　?、堍菥鋭用~作表語，與主語部分可以轉(zhuǎn)換，如Serving thepeople is out work,而⑥句中是現(xiàn)在分詞作表語，說明主語的性質(zhì)、狀態(tài)，現(xiàn)在分詞具有形容詞的各種特征，另外，動名詞作表語還應(yīng)與進行時態(tài)區(qū)別開來。 　　e.　It seemed selfish of him not to give them anything. 　　他不給他們?nèi)魏螙|西，這顯得太自私了?！?　　the first,the next,the last,the best,too much,too little,not enough,Kind,nice,stupid,rude,clever,foolish,thoughtful,thoughtless,brave,considerate,silly,elfish 　　例句： 　　a.　It39。. 此句只說明發(fā)明這一個事實，不定式后用原形即可。 　　b.　We believe him to be guilty. 　　我們相信他是有罪的。 　　c.　I want to talk to Tom. 　　我想和湯姆談話。 　　He seems to have caught a cold. 他似乎感冒了。 　　動詞不定式及其短語還可以有自己的賓語、狀語，雖然動詞不定式在語法上沒有表面上的直接主語，但它表達(dá)的意義是動作，這一動作一定由使動者發(fā)出。 　　動詞不定式指由to 加上動詞原形（而且只能是動詞原形）所構(gòu)成的一種非限定性動詞，但在有些情況下to可以省略。 　　2) 完成式：表示的動作發(fā)生在謂語動詞表示的動作之前。 　　I happen to know the answer to your question.　 　　我碰巧知道你那道問題的答案。 　　c.　The question is how to put it into practice. 　　問題是怎樣把它付諸實施?，F(xiàn)在分詞表達(dá)主動，也表達(dá)正在進行，過去分詞表達(dá)被動。 　　有些動詞需用as 短語做補語，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。 　　c.　It39。 　　例如：My work is to clean the room every day. 　　His dream is to be a doctor. 五、作定語　　不定式作表語表示具體動作或?qū)韯幼鳎粍用~作表語表示抽象的一般行為。m glad to see you. 　　典型例題 　　The chair looks rather hard, but in fact it is very fortable to ___. 　　A. sit　B. sit on　C. be seat　D. be sat on 　　答案：，其后應(yīng)有必要的介詞。s of sb. 　　1）for sb. 常用于表示事物的特征特點，表示客觀形式的形容詞，如easy, hard, difficult,　interesting, impossible等： 　　It39。 　　He is hard.　(人是困難的，不通，因此應(yīng)用for。s never too late to mend.　(諺語) 　　改過不嫌晚?！?已做) 　　The light in the office is stil on. He forgot to turn it off. 　　辦公室的燈還在亮著，它忘記關(guān)了。 　　stop doing　停止做某事。 　　Don39。regret to do sth. 　　對將要做的事感到遺憾。 　　You must try to be more careful. 　　你可要多加小心。 　　She was afraid to step further in grass because she was afraid of being 　　bitten by a snake. 　　她生怕被蛇咬著，而不敢在草叢中再走一步