поставьте предложения в вопросительную и отрицательную форму.
1. We should tell Peter about the result of the meeting?
2. I shall be able to do this work tomorrow

1. We should +  not ( или shouldn't) tell Peter about the result of the meeting.

2. I shall + not be able to do this work tomorrow

1. Should we  tell Peter about the result of the meeting?

2. Shall I  be able to do this work tomorrow?