Практическая грамматика

II. The Subjective Infinitive Construction is also used with the word groups to be likely, to be sure, and to be certain.
I think he is very likely to stay a week or two.
Я думаю, очень вероятно, что он останется на недельку- другую.
He is sure to marry her. (Hardy)
Он несомненно женится на ней.
Sentences of this kind are rendered in Russian by a simple sentence with a modal word.
III. The Subjective Infinitive Construction is used with the following pairs of synonyms: to seem and to appear; to happen and to chance (the latter is literary); to prove and to turn out.
The weather appears to be changing.
Кажется, погода меняется.
They seemed to have quite forgotten him already. (Hardy)
Они, казалось (по-видимому), уже совершенно забыли его.
Only yesterday we happened to see Soames Forsyte. (Galsworthy)
Только вчера мы случайно встретили Сомса Форсайта.
He turned out to be very strong.
Он оказался очень сильным.
Note. The Infinitive in sentences with the Subjective Infinitive Construction cannot refer to a future action except with verbs and word-groups whose meaning allows of it: to expect, to be sure (certain), to be likely.
Не is expected to give us an answer to-morrow.
Ожидают, что он даст нам ответ завтра.
He is sure to give us an answer tomorrow.
Он наверняка даст нам ответ завтра.
§ 34. The for-to-Infinitive Construction.
The for-to-Infinitive Construction is a construction in which the infinitive is in predicate relation to a noun or pronoun preceded by the preposition for.
In translating this construction Into Russian a subordinate clause or an infinitive is used.
The construction can have different functions in the sentence. It can be: