Yes. Не is quite sure it is so, but he doesn’t know for certain. That is why he didn’t say, He studied at Oxford but He must have studied at Oxford.
No. he is sure it is so, but he doesn’t know it. That is why he said, He can’t have learnt English in Poland and not He learned English in Poland.
Past. The perfect form have Ved(3) of the verb shows it.
Открыть всю книгу