Complete the sentences with the correct forms of the verbs in brackets.
1. We ______________________ (to drive) since five o'clock and we're still not there.
2. I __________________________(not / to do) very well in last week's exam.
3. They told us to leave the meeting because we ___________________ (to be) tired.
4. By the time we arrived, he ________________________ (already / to go) to school.
5. I've decided that next year I ______________________ (to study) harder.
6. Come on. Let's go out. I _________________________(to buy) you a cup of coffee.
7. We ________________________ (to have) a meeting at seven o'clock this evening.
8. You won't get a good job if you __________________ (not / to dress) more smartly.
9. I ______________________________ (not / to sack) him if he had worked harder.
10. If only I ___________________________(not / to forget) my lucky rabbit's foot.