Não sou muito bom no inglês, alguém pode me ajudar ?

Change from simple present to simple past

1. Peter finally begins to understend me.
2. They want to buy some fruit.
3. I prefer to pay in cash.
4. sheila eats her food very quickly.
5. Many students live on little money.
6. Some people go to England to study English.
7. They have to develop their creativity.
8. Sandra studies Math with a private teacher.
9. He plays the piano at that cafe.
10. Those young girls wear mini-skirts.

Não sei responder!!!