Dave Sperling Presents The....
2. Yes, I know that I __________ studied last night, but I decided to
watch TV instead.
3. Where's Jill? She __________ forgotten that we were supposed to meet at 2:00 PM.
4. I __________ been glad to help you. Why didn't you ask?
5. Look! It's raining and Professor Johnson is all wet. He __________
forgotten his umbrella again!
6. You __________ turned off the computer when you did! You've caused all
kinds of problems!
must not have
might not have
7. She __________ study last night, so she didn't.
didn't have to
didn't ought to
8. Yes, she __________ been here yesterday. I don't think she was, but I
can't prove that she wasn't.
9. I'm not sure where Dave is. He __________ taken Benjamin to a movie or to the zoo.
ought not to have
10. You shouldn't have driven so fast! You __________ had an accident!