IV. Выделите сказуемое, определите его видовременную форму и укажите инфинитив:
10. When I entered the office, the secretary was typing some letters.
11. What are you talking about?
12. Did you travel around Europe last year?
13. Don’t come at 6, I shall be doing my homework .
14. Will you come to the party with me?
15. Every day my aunt bakes a cake for lunch.
16. Yesterday I came home late.
17. What were you doing yesterday all day?
18. I shan’t play the piano tomorrow.