Ответ:

1. I should be delighted to get acquainted with the captain of your team.

2. He was annoyed to learn that they hadn't chosen him as a player for the Ail-Union match.

3. I was sorry to have missed the beginning of the match.

4. We must wait for the referee to whistle, then we'll see the teams coming out.

5. They wouldn't be surprised to receive an invitation to play in a tennis match with the fellows from our college.

6. You would be foolish to miss the chance.

7. I'm pleased to have been of some service to you.

8. She turned to me as if to ask me something.

9. We are happy to have won, it was a difficult match.

10. I was sorry to hear of their failure.

11. I'm sorry to have been of so little assistance. 12. He pressed his finger to his lips as if to warn her.

Объяснение:

В английском языке у инфинитива 4 формы: простой инфинитив (simple) - to do; используется для обозначения кратковременного действия в настоящем или будущем времени;

длительный (continuous) - to be doing, указывает на продолжительное действие в настоящем или будущем времени;

перфектный инфинитив (perfect) - to have done, называет действие, которое произошло раньше указанного в предложении момента речи или раньше другого действия;

перфектный длительный (perfect continuous) - to have been doing, показывает действие, которое длится до определенного момента или другого действия в настоящем.

Кроме того, формы инфинитива могут использоваться в действительном (active) и страдательном залогах (passive).