4 A. All other days of my holiday were wonderful too. We had short and long trips to different places in the mountains and in the city. We went to the shops, visited the US Bank Tower which is 310 metres high (one of the tallest buildings in the world). We drove to Santa Barbara and spent six days there. It's a beautiful place on the beach 50 kilometres from Los Angeles. I swam a lot there. My two weeks in America were just wonderful and passed like two days.
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.
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