1 have reading 2 have playing 3 has cleaning 4 has swimming 5 has speaking 6 have waiting 7 have doing 8 has snowing 9 have riding 10 has explaining
1 I haven't reading this book. 2 We haven't playing volleyball or 20 minutes. 3 She hasn't cleaning the flat for more than an hour. 4 Peter hasn't swimming for half an hour. 5 Ann hasn't speakingon the phone for an hour now. 6 You haven't waiting for a bus for ten minutes only. 7 Nelly and Mary haven't doing the shopping since early morning. 8 It hasn't snowing since last night. 9 Jack and his friend haven't riding bikes for three hours now. 10 The teacher hasn't explaining a grammar rule since the beginning of the lesson.
1. I have been reading this book for three days.
I have not been reading this book for three days.
Have I been reading this book for three days?
2. We have been playing volleyball for twenty minutes.
We have not been playing volleyball for twenty minutes.
Have we been playing volleyball for twenty minutes?
3. She has been cleaning the flat for more than an hour.
She has not been cleaning the flat for more than an hour.
Has she been cleaning the flat for more than an hour?
4. Peter has been swimming for half an hour.
Peter has not been swimming for half an hour.
Has Peter been swimming for half an hour?
5. Ann has been speaking on the phone for an hour now.
Ann has not been speaking on the phone for an hour now.
Has Ann been speaking on the phone for an hour now?
6. You have been waiting for a bus for ten minutes only.
You have not been waiting for a bus for ten minutes only.
Have you been waiting for a bus for ten minutes only.
Thin-slim
To fail to do because of doubt-to hesitate
To make know-to introduce
Usual-common
To become familiar with-to get acquainted