помогите, пожалуйста а, то не разумею вот это

косвенная речь)

1)Bob said that his friend played tennis very well.

2)The teacher asked Willy to open the door.

3) Liz asked where New York was situated.

4)Christina said  that she wanted to celebrate Christmas at home.

5) Linda asked me if i had enjoyed my winter holidays in Paris.

6) Mother said to Frank not to eat all the jam!

7) Sally asked his friend to help her with Maths.

8) Marry asked her son not to bathe in the lake .It was cold that day!