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?
PS: Present or Past Continuous
Present Continuous
am(i)
is(he she it) + Ving (V-verb)
are(you we they)
Показатели времени: now, at the moment
Past Continuous
was(i he she it)
were(you we they) + Ving
Показатели времени: at this time yesterday, the whole day
PSS: я специально подчеркнул в задании показатели, чтобы можно было понять где какое время
