turn these sentences into negative and then interrogative:

1. he gave some examples in his lecture.
2. i read some articles on this subject a week ago.
3. there were some chairs at the entrance to the hall.

1. He didn`t give some examples in his lecture

1.  Did he give some examples in his lecture?

2.  I  didn`t read some articles on this subject a week ago.

2. Did I read some articles on this subject a week ago?

3. There weren`t some chairs at the entrance to the hall.

3. Were there some chairs at the entrance to the hall?

Объяснение: