不定式

不定式和動(dòng)詞象一對(duì)姐妹一樣親密，本不該拆開(kāi)來(lái)講，可是篇幅有限，只能讓他們分開(kāi)了。不定式的構(gòu)成非常簡(jiǎn)單，告訴我是什么？對(duì)！是to+動(dòng)詞原形。當(dāng)然啦，to有時(shí)也可以不帶。動(dòng)詞不定式?jīng)]有人稱和數(shù)的變化，可以擔(dān)當(dāng)除謂語(yǔ)外的任何句子成分。那什么時(shí)候可以不帶to呢?Listentomecarefully.

不定式省to有四種情況：

使役動(dòng)詞let,have,make等后接不定式。如：Lethimgo!讓他走!

wouldrather，hadbetter后。如：Youhadbetterstayathome.你最好呆在家里。

Why.../whynot...后。如：WhynothaveagoodrestonSunday?為什么星期天不好好休息一下呢?

感官動(dòng)詞see,watch,lookat,hear,listento,smell,feel,find等后作賓補(bǔ)，省to。如：Isawhimdance.我看見(jiàn)他跳舞。

注意：這些情況在被動(dòng)句中可千萬(wàn)不可省to喲！如：Thebossmadethemworkthewholenight.變成被動(dòng)句：Theyweremadetoworkthewholenight.

不定式的特殊用法：

It與不定式：動(dòng)詞不定式可以做主語(yǔ)，但如果動(dòng)詞不定式太長(zhǎng)，顯得頭重腳輕的，那么我們就可用形式主語(yǔ)it代替，而把真正主語(yǔ)(即不定式)放于句尾。

如:ItisnotdifficultformetostudyEnglishwell.(對(duì)我來(lái)說(shuō)學(xué)好英語(yǔ)是可能的。)不定式還可以充當(dāng)句子的賓語(yǔ)，但有些動(dòng)詞，如find，think，believe等，在語(yǔ)法上不能接受不定式作賓語(yǔ)，只有用it作形式賓語(yǔ)，從而把動(dòng)詞不定式置于句尾。這樣的不定式可繼續(xù)充當(dāng)其賓語(yǔ)的作用。

如:Ifounditdifficulttofallasleep.我發(fā)現(xiàn)很難入睡。

還有一點(diǎn)：動(dòng)詞不定式，還可用在how，when，where，what，which等疑問(wèn)代詞或副詞之后，與其共同作賓語(yǔ)。如：Idon'tknowhowtouseacomputer.我不知道怎樣使用電腦。Remember?B.topickupthem

C.pickitup

D.pickupit

7.Sheisveryill,let's_______adoctoratonce.

A.towakeup

B.sendfor

C.topayfor

D.payfor

8.Iwant________ateacherwhenIgrowup.

A.tobe

B.to

C.be

D.being

9.It'scoldhere.You'dbetter______yourcoat.

A.nottakeout

B.nottotakedown

C.nottakeoff

D.nottotakeaway

10.Mymothertoldme________morewater.

A.drinking

B.drank

C.todrink

D.drink

實(shí)戰(zhàn)：

1.You'dbetter_______readinthesun.

A.notto

B.not

C.don't

D.to

2.Youaren'tanewdriver,areyou?_______.

A.No,Iam

B.Yes,I'mnot

C.No,youare

D.Yes,Iam

3.MustIstayherenow?_________.

A.No,youmustn't

B.No,youneedn't

C.Yes,youcan

D.Yes,youmay

4.Thereis_______"s"intheword"bus".

A.a

B.an

C.the

D./

5.Neithereofus______adoctor.

A.is

B.isn't

C.are

D.aren't

6.Whowasthefirstinthegirls'_________race?

A.400metre

B.400-metre

C.400metres

D.400-metres

7.It'stoonoisyhere,Ican't_______.

A.gotosleep

B.falltosleep

C.sleeping

D.gettosleep

8.Thestoryhappened________theeveningofOctober20,1995.

A.at

B.onC.in

D.to

9.CouldIspeaktoMrGao,please?________.Hehasgonetothehospital.

A.Ithinkso

B.Certainly,youcan

C.I'mafraidnot

D.I'mnotsure

10.I'msorrytotroubleyou,MissHu.________.

A.Fine,thankyou.

B.Allright.

C.It'sverykindofyou.

D.Itdoesn'tmatter.

11.Canyoutellmewhere________?

A.isthepostoffice

B.thepostofficeis

C.doesthepostoffice

D.thepostofficedoes

12.InEngland,thefirstnameis_______name,butinChina,thefirstnameis______name.

A.family,given

B.given,family

C.family,family

D.given,given

13.LiPingmetanoldfriendof_______onatrainyesterday.

A.he

B.him

C.his

D.her

14.Kateis________girl.

A.aeighteen-year-old

B.aeighteen-years-old

C.aneighteen-years-old

D.aneighteen-year-old