IV. Give the correct form of the verbs in brackets.
1. I (be) ____________________ there when you arrive.
2. They were still waiting when I (get) ____________________ there.
3. Jack has worked very hard since he (be) ____________________ here.
4. We had just come in when you (call) ____________________.
5. We decided to go home because it (be) ____________________ very late.
6. I haven’t seen him since he (arrive) ____________________.
7. I am interested in (play) ________________ badminton in my free time.