Перепишите следующие предложения, определите в каждом из них временную группу и залог инфинитива. Переведите предложения на русский язык.
1. They were glad to take part in our expedition.
2. The valuable information to be collected by sputniks will help to improve previous results.
3. To drive a car in a big city is very difficult.
4. He was happy to be working for many years with the famouse scientist.
5. To study this phenomenon requires mush knowledge.

1 Past simple , passive

2 Future simple, passive

3 Present simple, active

4 Past simple, passive

5 Present simple, active