1. 动词+带to不定式,例如:

to expect to see

to fail to pass his driver's test

to agree to smoke no more cigarrettes

to arrange to meet him

to ask to see the manager

to hope to get a few more

to pretend not to see me

to happen to meet

常见的还有以下动词:

decide,demand,determine,attempt,claim,consent,deserve,long,plan,prepare,

presume,promise,refuse,resolve,strive,wish,volunteer,intend,desire,offer,

mean,learn,threaten,try,want,aim,undertake,choose,decline,seek,tend

2. 若干结构+不带to不定式,例如:

You had better have a look at this picture.

I would rather not wait.

常用的结构有:would rather, had rather, would sooner, rather than,

had better, may(just) as well, would you please

另外,在let 后跟不带to不定式,例如:

Let come what may.

Let there be no mistake about this.

在help后,不定式作宾语可带to也可不带,例如:

Can I help(to) carry it for you?

I help him (to) mend his bicycle.

3. 少数动词加不定式

动词不定式一般不做介词宾语,但下列介词用在含否定意义的句子中,其后可跟不

定式（注意带to和不带to的情况）。

(1) 介词except有两种情况，若该介词前有do，后跟的不定式不带to，其他情况

带to。例如：

The child did nothing except weep.

He will do anything for you except lend you money.

下述句子中跟to不定式

He seldom comes except to look at my pictures.

There is nothing to be done except to return.

(2) 介词besides,than,save(均作"除…之外"解)后常常跟不带to的不定式,例如:

They did nothing else than laugh.

What had she done for her father save leave him at the first opportunity?

I hardly remember what I did besides read.

(3) 当but用作except解时,可跟带to不定式,例如:

They had no way out but to surrender.

She had no choice but to swallow the letter.

但是,在"do nothing but", "can not but" 和 "can not help but"(三者意为

"不得不")短语后,跟不带to的不定式,例如:

They could do nothing but wait for the doctors to arrive.

She could not but admit that they were justified in this.

That cannot help but have an impact on his idea.

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