1. I (am writing) an English exercise now.
2. I (was writing) an English exercise at this time yesterday,
3. My little sister (is sleeping) now.
4 My little sister (was sleeping) at this time yesterday.
5. My friends (aren't doing) their homework now. They (are playing) volley-ball.
6. My friends (weren't doing) their homework at seven o'clock yesterday. They (were playing) volley-ball.
7. (Are you eating) ice-cream now?
8. (Were you eating) ice-cream when I rang you up yesterday?
9. What (is your father doing) now?
10. What (was your father doing) from eight till nine yesterday?
11. Why (is she crying) now?
12. Why (was she crying) when I saw her yesterday?
13. She (was reading) the whole evening yesterday.
14. She (isn't reading) now,
15. Now she (is going) to school.
16. What (are you doing) now? —-I (am drinking) tea.
17. (Were you drinking) tea at this time yesterday? — No, I (wasn't drinking) tea at this time yesterday, I (was eating) a banana.
18. My sister is fond of reading. She (was reading) the whole evening yesterday, and now she (is reading) again,
19. Look! My cat (is playing) with a ball.
20. When I went out into the garden, the sun (was shining) and birds (were singing) in the trees.
