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不定式的定義(已修改)

2025-08-16 23:46 本頁面
 

【正文】 不定式的定義  在語法中,[1]是動(dòng)詞的一種不帶詞形變化從而不指示人稱、數(shù)量、時(shí)態(tài)的形式。它被叫做不定式,是因?yàn)閯?dòng)詞不被限定,或者說不被詞形變化所局限。   動(dòng)詞不定式指由to 加上動(dòng)詞原形(而且只能是動(dòng)詞原形)所構(gòu)成的一種非限定性動(dòng)詞,但在有些情況下to可以省略。動(dòng)詞不定式在語法功能上可作主語 、賓語、表語、定語和狀語。 動(dòng)詞不定式的構(gòu)成與形式  動(dòng)詞不定式可以作以上各種成分,但它畢竟是動(dòng)詞,所以有動(dòng)詞的屬性。   動(dòng)詞不定式及其短語還可以有自己的賓語、狀語,雖然動(dòng)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(dòng)作,這一動(dòng)作一定由使動(dòng)者發(fā)出。這一使動(dòng)者我們稱之為邏輯主語,其形式如下:    時(shí)態(tài)主動(dòng)形式被動(dòng)形式一般式(not)to do(not)to be done完成式(not)to have done (not)to have been done進(jìn)行式(not)to be doing?完成進(jìn)行式(not)to have been doing?1) 一般式:一般現(xiàn)在時(shí)表示的動(dòng)詞,有時(shí)與謂語動(dòng)詞表示的動(dòng)作同時(shí)發(fā)生,有時(shí)發(fā)生在謂語動(dòng)詞的動(dòng)作之后。   He seems to know 。   I hope to see you again. = I hope that I39。ll see you again. 我希望再見到你。   2) 完成式:表示的動(dòng)作發(fā)生在謂語動(dòng)詞表示的動(dòng)作之前。   I39。m sorry to have given you so much trouble. 很抱歉給你添了這么多麻煩。   He seems to have caught a cold. 他似乎感冒了。   3) 進(jìn)行式:表示動(dòng)作正在進(jìn)行,與謂語動(dòng)詞表示的動(dòng)作同時(shí)發(fā)生。   He seems to be eating 。   4) 完成進(jìn)行式:   She is known to have been wreaking on the problem for many 。 不定式在句中的成分一、作賓語  1)動(dòng)詞+ 不定式afford,aim,appear,agree,arrange,ask,be,decide,bother,care,choose,e,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.    The driver failed to see the other car in time.    司機(jī)沒能及時(shí)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(dòng)詞+賓語+不定式   ask, beg, choose, expect , hate, help intend like, love, need prefer, prepare, promise, want, wish…   例句:   a. I like to keep everything clean.   我喜歡每件東西都保持整潔。   b. I like you to keep everything clean.   我喜歡你能使每件東西都保持整潔。   c. I want to talk to Tom.   我想和湯姆談話。   d. I want you to talk to Tom.   我想讓你和湯姆談話。   3)動(dòng)詞+疑問詞+ 不定式   decide, know, consider forget, learn, remember, show, understand, see, wonder, hear, find out, explain, tell    例句:   a. Please show us how to do that.   請演示給我們?nèi)绾稳プ觥?  b. There are so many kinds of taperecorders on sale that I can39。t make up my mind which to buy.   有這么多的錄音機(jī),我都拿不定主意買哪一種。   c. The question is how to put it into practice.   問題是怎樣把它付諸實(shí)施。  ?。ㄗ⒁猓阂蓡栐~帶不定式在句中作成分時(shí),謂語動(dòng)詞用單數(shù)。) 二、作補(bǔ)語  1) 動(dòng)詞+賓語+不定式(to do)     advise,allow,appoint,believe,cause,challenge,mand,pel,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(bǔ),或先加形式賓語,再加形容詞,最后加帶to 的動(dòng)詞不定式。find后也可帶一個(gè)從句。此類動(dòng)詞還有g(shù)et,have。   例句:   a. I found him lying on the ground.   b. I found it important to learn.   c. 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:,用分詞或分詞短語,起賓語補(bǔ)足語作用?,F(xiàn)在分詞表達(dá)主動(dòng),也表達(dá)正在進(jìn)行,過去分詞表達(dá)被動(dòng)。   2) to + be 的不定式結(jié)構(gòu),作補(bǔ)語的動(dòng)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   例句:   a. We consider Tom to be one of the best students in our class.
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