Put the verbs in Present Continuous or Past Continuous.
Example: Where is Tom? He (to have) a shower. – Where is Tom? He is having a shower.

1. 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) volleyball. 6. My friends (not to do) their homework at seven o'clock yesterday. They (to play) volleyball. 7. She (to read) the whole evening yesterday. 8. She (not to read) now. 9. Now she (to go) to school. 10. What you (to do) now? - I (to drink) tea. 11. You (to drink) tea at this time yesterday? - No, I (not to drink) tea at this time yesterday, I (to eat) a banana. 12. My sister is fond of reading. She (to read) the whole evening yesterday, and now she (to read) again.