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3. The Perfect Infinitive denotes an action prior to that expressed bу the finite verb.

He seems to have known her before.

He was sorry to have come so early.

Perfect infinitives are often used when we talk about things that didn’t happen:

I meant to have invited him but I forgot to do it.

We were to have met but she didn’t come to the party.

You should have told me about it earlier. Why didn’t you?

4. The Perfect Continuous Infinitive denotes an action which lasted а certain time before the action of the finite verb. It is not only а tense form, but also an aspect form, expressing both the priority and the manner of the action.

He seems to have been working in the lab since morning.

He must have been waiting for you long enough.

Voice disтinctions of тhe infiniтive

The Infinitive of the transitive verbs has special forms for the Active and the Passive voice.

They decided to send John to Washington. – Indefinite Active

He is glad to be sent on а business trip. – Indefinite Passive

They seem to have sent John to Washington. – Perfect Active

He is glad to have been sent on а business trip. – Perfect Passive

The active form of the Infinitive shows that the subject of the sentence, the person or thing characterized by the Infinitive, or the person or thing expressed in the Infinitive predicative construction is the doer of the action denoted by the Infinitive:

I hope to see you again soon.

He is the person to help you.

We saw him send this letter.

The passive form of the Infinitive shows that the subject of the sentence, the person or thing characterized by the Infinitive, or the person or thing expressed in the Infinitive predicative construction is affected by the action denoted by the Infinitive:

He was eager to be nominated as the best actor.

There is another question to be discussed.

I expect him to be awarded first prize.

Continuous passive forms are not normally used.

In sentences with the construction ‘there is’ the Infinitive of some verbs can be active or passive without any change in meaning:

There is nothing to fear.

There is nothing to be feared.

Note: There is difference in meaning in the following sentences:

It’s so boring here. There is nothing to do. – Нечего делать.

There is nothing to be done now. (It’s impossible to do anything now) – Ничего нельзя сделать.

FORMS OF THE INFINITIVE

TENSE, ASPECT / VOICE

Active

Passive

Non-perfect Indefinite (Simple)

to do

to be done

Non-perfect Continuous

to be doing

-

Perfect Simple

to have done

to hаvе bееn done

Perfect Continuous

to have been doing

-

The negative forms are made by putting the negative particle ‘not’ before the Infinitive:

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