английский, грамматика.. помогите пожалуйста!

помогите раскрыть скобки и объяснить каждый случай

Open the brackets:

1. I don't like Alice. She (to complain) about difficulties of life all the time.

2. I( to burn) my hand on a hot stove yesterday.

3. I am tired. We (to walk) for more than an hour. Let's stop and rest for a while.

4.Before i went to bed i decided to check the front door. I was sure my sister (to lock) it. And i was right!

5. Before Adam got married, he (to go) hiking to the mountains every summer. Now he goes to the seaside with his wife.

6.The wind (to blow) down the tree in our front yard last week.

7.A group of scientists are travelling around Africa. How many countries (to visit) so far, i wonder?

8. He( to feel) ill for three days, so his mother wanted to bring him to a doctor, but he didn't want to go.

9. David is quite an athlete. He wants to be strong and healthy that's why he (to jog) every morning.

10. The Alisons have got three cars, two of which they never (to use).

11.She (to take) too long to get ready. We are going to be late.

12. It was in the spring when leaves appear on trees and nature prepares herself for renewal. Other things happen too-people (to fall) in love.

13. When Alice was small, she (to be afraid) of darkness and always slept with the light on.

14.I (to read) this book for 2 weeks.

15. Robert didn't answer the phone when Mary called. He (to take) a shower and didn't hear the phone ring.

16. Jerry promised to come to work in time. He is not here, and he even(to call).

17. The train (to leave) at 12 p.m. today.

18. The government is worried bacause the number of people without jobs (to increase).

19. While the kids (to play) in the garden, their mother was hurriedly cooking dinner.

20. Paul looks young for his age. He says hi is 56 years old, but nobody (to believe ) him.