1. Look at these children: they (to skate) very well. 2. You (to skate) last Sunday? — Yes, we (to skate) the
whole day last Sunday. 3. My brother ca
n skate very well. He (to skate) every Sunday. 4. What you (to do)
now? — I (to wash) the dishes. 5. What you (to do) at three o'clock yesterday? — I (to have) dinner. 6. You
(to have) dinner now? 7. Where your brother (to work)? — He (to work) at an institute. 8. Your
grandmother (to sleep) when you (to come) home yesterday? 9. I (not to go) to the shop yesterday. 10.
Where Kate (to go) when you (to meet) her yesterday? 11. Every day the boss (to enter) the office at nine
o'clock. 12. Yesterday the boss (to enter) the office at half past nine. 13. At six o'clock yesterday we (to
listen) to a very interesting lecture. 14. When I (to enter) the office, the secretary (to type) some letters. 15.
My friend (to ring) me up at eight o'clock yesterday