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