В пособии рассматриваются основные моменты английской грамматики: части речи имя существительное, имя прилагательное и наречие; видо-временные формы глагола; модальные глаголы; неличные формы глагола

10. The Infinitive as Object of an Adjective

A. Many adjectives can be followed by infinitives. Adjectives having infinitives
as objects are generally used after the link-verb to be and some others. The
infinitive is always preceded by to in this function.
He would be crazy not to do so.
I am sorry to have done you harm.
He seemed glad to have me there.
When a verb is used with a preposition, this often comes at the end of the
sentence:
She’s very nice to talk to.
He is easy to get on with.
Occasionally a for-phrase is used to indicate the subject of the infinitive:
I am prepared for everyone to accuse me of being foolish.
B. The infinitive is also found after adjectives in sentences with a ‘preparatory
subject’ it:
It’s a little late to admit it, I know.
It’s unusual to meet a shy girl nowadays.
A for-phrase is often used in such sentences:
It’s essential for classrooms to have plenty of light.
Do you think it’s normal for a child to get so tired.

11. The Infinitive after Interrogative Conjunction

The infinitive as object may be part of a phrase introduced by the
interrogative conjunctions whether, what, who, whom, which, when,
where,
how and how long. The infinitive is always preceded by to here. The wh-
phrase + infinitive usually occurs after the verbs know, ask, tell, explain,
show, wonder, consider, find out, understand, decide, and others with similar
meanings.
I wonder who to invite.
Show us what to do.
Ask my brother when to pay.
I can’t decide whether to answer his letter.
Note that it is not possible to begin a question with How to…? Where
to…?, etc. Instead, we say, for example: How shall I tell her? Who
should I pay?