БАЛОВ
Answer the questions.
1. Who is talking? Where are they?
2. What has the man already seen in London?
3. What place of interest did he choose?
4. Has he ever travelled on a double-decker?
5. What will the man start with?

1. I can stay in bed tomorrow morning because I don't have to work.
2. Whatever you do, you mustn't touch that switch. It`s very dangerous.
3. You mustn't forget what I told you. It`s very important.
4. We don't have to leave yet. We`ve got plenty of time.
5. Ann was feeling ill last night. She had to leave the party early.
6. I had to go to the bank yesterday to get some money.
7. The windows are very dirty. I must clean them.
8. The windows aren`t dirty. You don't have to clean them.
9. We arrived home very late last night. We had to wait half an hour for a taxi.
10. These cakes are very nice. You must have one.
11. We don't have to take an umbrella. It`s not going to rain.

Continuous 3. are being analysed 6. am analysing 8. were analysing 4. was being heated 8. is heating  2. are transforming  7. were transforming  1. was testing  4. was being tested
Perfect  4. has been analysed  7. had analysed 2. had heated 3. shall have been heated  5. will have heated 1. have been transformed  4. will have transformed 5. has transformed  2. have tested  5. had been tested
Perfect Continuous  7. has been heating 6. will have been transforming  7. has been testing
Simple 1. was analysed 2. will analyse  5. analysed  1. shall heat  6. heat  3. transforms  3. tests  6. is tested 8. shall be tested