**Exercise 12:**
1. If it **rains**, could you bring in the washing from the garden?
2. The speed limit is 30 miles an hour but Tom **is driving** so fast.
3. I like **playing** tennis but I wouldn't like **to play**.
4. She advised me **to consider** all the facts before **deciding**.
5. My house **was built** in 1980 at 50 miles at that time. He shouldn't **have been**.
**Exercise 13:**
1. Do not turn off the TV! She **is watching** the weather forecast.
2. The Smiths **spent** two days in Ha Noi before they **traveled** to Sa Pa last week.
3. My brother **has not called** us since he **moved** to Ho Chi Minh City last month.
4. The children **were playing** football when their mother **came** back home.
5. I **phoned** her last night but she **did not answer**.
6. At 4 o'clock tomorrow afternoon we **will be playing**.
7. They **are coming**.
**Additional sentences:**
8. They wish they **had not**.
9. Do you ever regret **not studying**?
10. I was a bit lazy this time, but I promise **to study** harder next time.