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  7. 動詞不定式

  7.1 不定式作賓語

  1) 動詞+ 不定式

  afford  aim   appear  agree  arrange  ask   be    decide bother  care  choose   come    dare   demand desire  determine   expect   elect  endeavor   hope     fail  happen  help  hesitate learn  long   mean   manage  offer  ought   plan  prepare pretend   promise refuse seem   tend   wait    wish   undertake

  舉例: 

  The driver failed to see the other car in time.

  司機沒能及時看見另一輛車。

  I happen to know the answer to your question.

  我碰巧知道你那道問題的答案。

  2)動詞+不定式 ; 動詞+賓語+不定式

  ask, beg, choose, expect , hate, help intend like, love, need prefer, prepare, promise, want, wish…

  I like to keep everything tidy. 我喜歡每件東西都保持整潔。

  I like you to keep everything tidy. 我喜歡你年使每件東西都保持整潔。

  I want to speak to Tom.  我想和湯姆談話。

  I want you to speak to Tom.  我想讓你和湯姆談話。

  3) 動詞+疑問詞+ to

  decide, know, consider forget, learn, remember, show, understand, see, wonder, hear, find out, explain, tell

  Please show us how to do that. 請演示給我們?nèi)绾稳プ觥?P>  There are so many kinds of tape-recorders on sale that I can‘t make up my mind which to buy.有這么多的錄音機,我都拿不定主意買哪一種。

  注意:疑問詞帶不定式在句中作成分時,謂語動詞用單數(shù)。

  The question is how to put it into practice.

  問題是怎樣把它付諸實

  7.2 不定式作補語

  1) 動詞+賓語+不定式(to do)

  advise   allow   appoint   believe   cause   challenge command  compel   consider  declare   drive   enable  encourage  find    forbid   force   guess   hire  imagine  impel   induce   inform  instruct  invite   judge    know    like   order    permit  persuade  remind   report  request   require  select send    state   suppose   tell    think  train   trust   understand urge    warn 

  例句

  a. Father will not allow us to play on the street.     

  父親不讓我們在街上玩耍。

  b. We believe him to be guilty.

  我們相信他是有罪的。

  Find 的特殊用法:

  Find 后可用分詞做賓補,或先加形式賓語,再加形容詞,最后加帶to 的動詞不定式。find后也可帶一個從句。此類動詞還有g(shù)et,have。

  I found him lying on the ground.

  I found it important to learn.

  I found that to learn English is important.

  典型例題:

  The next morning she found the man ___ in bed,dead. 

  A. lying 

  B. lie 

  C. lay 

  D. laying  

  答案:A.find的賓語后面,用分詞或分詞短語,起賓語補足語作用,F(xiàn)在分詞表達(dá)主動,也表達(dá)正在進(jìn)行,過去分詞表達(dá)被動。

  2) to + be 的不定式結(jié)構(gòu),作補語的動詞。

  Acknowledge,  believe, consider,think,declare(聲稱),discover, fancy(設(shè)想),feel find,guess,judge,imagine,know,prove,see(理解), show,suppose,take(以為), understand

  We consider Tom to be one of the best students in our class.

  我們認(rèn)為湯姆是班上最好的學(xué)生之一。

  典型例題

  Charles Babbage is generally considered ___ the first computer. 

  A. to invent 

  B. inventing 

  C. to have invented 

  D. having invented 

  答案:A. 由consider to do sth. 排除B、D。. 此句只說明發(fā)明這一個事實,不定式后用原形即可。而C為現(xiàn)在完成時,發(fā)明為點動詞一般不用完成時,且此處也不強調(diào)對現(xiàn)在的影響,因此不選C。

  3) to be +形容詞

  Seem, appear,be said,be supposed,be believed,be thought,be known,be reported,hope, wish,desire,want,plan,expect,mean…

  The book is believed to be uninteresting.

  人們認(rèn)為這本書沒什么意思。

  4) there be+不定式

  believe, expect, intend, like, love, mean, prefer, want, wish, undrstand

  We didn‘t expect there to be so many people there.我們沒料到會有那么多人在哪里。

  注意 : 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。

  Mary took him as her father . 瑪麗把他當(dāng)作自己的父親。

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