1. Be quiet ! The baby (sleep) is sleeping.
2. The sun (set) sets in the west.
3.Mr Green always (go) goes to work by bus. 
4. It ( not rain ) doesn't rain in the dry season.
5. They (have) are having lunch in the cafeteria now.
6. My little sister (drink) drinks milk every day.
7. The doctor sometimes (return) returns home late.
8. He (write) is writing a long novel at present.
9. Look ! The bus (come) is coming.
10. The earth (move) moving around the sun.
11. Sometimes it (smell) is smelling good in the kitchen now.
12. His uncle (teach) taught English in our school five years ago.
13. The old man (fall) fell as he (get) got into the bus.
14. When I saw him, he (sit) was sitting asleep in a chair.
15. There (be) are a lot of noise at the fair yesterday.
16. It (take) took me 5 minutes to walk to school last year.
17. They (not speak) haven't spoken to each other since they quarreled
18. I (try) have been trying to learn English for years, but I (not succeed) haven't succeeded yet
19. I (not see) haven't seen her since last week.
20. John (do) has done his homework already.

1sleeping

2set

3goes

4not raining

5have

6has drink

7returning

8writing

9coming

10moving

11smell

12teach

13

14sit

15are

16toke

17havespeake

18try,not succing

19haven't see

20does 

19