文档介绍：不定式
不定式具有动词的性质, 在句中可有自己的宾语,并可被状语所修饰。同时还具有名词,形容词和副词的性质,在句中可作主语、宾语、表语、宾语补语、定语、状语等成分。
动词不定式作主语
To e a good teacher was my hope.
在现代英语中,经常把代词it放在句首作形式主语,而把真正的主语(不定式)放在句末。
It is impossible for her to buy the car with cash.
It took us three weeks to finish the work.
通常说明或解释主语的内容、也可表示将来的动作。
Our purpose is to finish the job in the three weeks.
The duties of a post man are to deliver letters and newspapers.
1、英语中有一部分动词常跟不定式作宾语。
She hopes to get something from the sales.
I guarantee to pay off his debt.
The children refused to listen to me.
常这样用的词有
Agree同意 fail未能 promise保证 afford担负得起 forget prove证明 arrange安排 guarantee保证 refuse ask要求 happen碰巧 resolve决心 attempt试图 hesitate犹豫 seek试图 bother麻烦 hope seem care愿意 learn tend倾向于 choose long渴望 threaten威胁 claim声称 manage设法 trouble麻烦 consent同意 neglect忽视 try努力 decide offer提出 undertake承担 demand要求 plan volunteer志愿 determine决定 prepare want determined决心 pretend假装 wish endeavor 努力 proceed继续
,这时要用it作形式宾语,而将不定式放到宾语的后面。
I believe it wrong to tell it to her
I feel it an honor to be asked to speak here.
。
She wished those books to be returned sooner.
My parents won’t allow me to stay out late.
五、不定式作定语
1、不定式用在the first , the second, the last, the only等短语后面作定语
He was the first to arrive.
She was the only one to survive the crash.
不带to的动词不定式
在表示感觉的动词如feel, hear,see,w