1) It's late, I must go now.
2) I dont't usually work on Saturdays but last Saturday I had to work.
3) I went to London by train last week. The train was full and I had to stand all the way.
4) I must get up early tomorrow. I've got a lot to do.
5) I was nearly late for my appointment this morning, I had to run to get there on time.
6) I forgot to phone David yesterday, I must phone him later today.
Exercise 2.
1) I'm not ready yet but you needn't wait for me. You can go now and come later.
2) We musn't forget to turn off the lights before we leave.
Exercise 3.
1) It's late and you're very tired, you should go to bad.
2) You should clean your teeth twice a day.
3) If you have time, you should visit the Science Museum. It's very interesting.
4) When you're driving, you should wear a seat belt.
5) It's too far to walk from here to the station. You should take a taxi.
Exercise 4.
1) I might see you tomorrow
2) Ann might forget to phone.
3) It might snow today.
4) I might be late tonight.
5) Mary might not be here.
6) I might not have time to meet you.
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вот такие вот бунтовщики и разрушают Империю