1. should
2. can't
3. Will
4. mustn't
5. can
6. must
7. can't
8. should
9. can
10. will
I am a student.
Am I a student?
I am not a student.
He is a good doctor.
Is he a doctor?
He is not a doctor.
They are my best friends.
Are they my best friends?
They are not my best friends.
He is at home now.
IS he at home now?
He is not at home now.
Your book is here, under the table
We must try to be away by 8 o'clock.
Will you be around this time next year?
We start to work at 5.
Do you finish to work at 7?
They were working on a new book.
You have to work at being friendlier with people.
She works for a large firm
She works for a large firm
His plan didn't work.
I work as a teacher
He worked them nearly to death.
The pump will not work.
2. can’t
3. will
4. mustn’t
5. can
6. must
7. can’t
8. should
9. can
10. won’t