Mark the sentences T(true) or F(false). 1 Adults need one more hour of sleep per night than teens.

2 Teens' bodies want them to sleep and wake up late.

3 Waking up late makes teenagers' brains more alert.

4 Not getting enough sleep can make teens less likely to exercise.

5 It's better for you to go to bed with a full stomach.

6 You should go to bed and wake up at the same time every day.​

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

1. We have lived in Moscow now since 1960
2. I have studied English twice a week since childhood
3. It has been powered by the company three days a week for two years
4. They have gone to the store every Saturday since they moved here
5. We have meet each other sometimes for many years
6. I have known this man now since we went to school
7. I've been here every day since 9 o'clock
8. He has played football once a week since early childhood
9. He has driven a car now since he got the driving license
10. They have received letters from him regularly since last spring