Какие есть грамматические ошибки в предложениях?
1) The accident happened when they were driving home.
2) The crowd was cheering when the referee blew the final whistle.
3) I didn't recognize her at first because she had changed so much.
4) The police stopped her on the motorway because she wasn't wearing seat belt.
5) Some of the players weren't listening while the coach was talking to them.
6) We didn't can use the ski slope because it hadn't snowed enough.
7) They didn't able to play tennis because they hadn't booked a court.
8) The player got a yellow card because he had taken off his shirt.

6) We couldn't use the ski slope because it hadn't snowed enough. 7) They weren't able to play tennis because they hadn't booked a court. 8) The player got a yellow card because he had taken off his shirt.