4. We told them not to talk in class.
5. He told her to switch off the TV.
6. She told Tom to shut the door.
7. I told them not to watch late-night horror movies.
8. I said, "Don't touch that switch, Mary."
9. I told him not to hurry.
10. The secretary asked me to please fill up this form.

We said to them, "Please, don't talk in class"
→... we said to them not to talk in class ....
5. He said to her, 'Switch off the TV,'.
→... he said to her to switch off the. TV 
6. She said to Tom, 'Shut the door.'
→....she said to Tom to shut the door ....
7. I said to them, "Don't watch late-night horror movies."
→.... I said to them not to watch late -nigh horror movie 
8. I said, 'Don't touch that switch, Mary."
→..I said  to her not to  tough that switch ......
9. I said to him, "Don't hurry."
→..I said to him not to hurry
.....

4. We said to them, "Please, don't talk in class"
→.......We asked them not to talk in class.
5. He said to her, 'Switch off the TV,'.
→........He asked her to switch off the TV.
6. She said to Tom, 'Shut the door.'
→..........She told Tom to shut the door.
7. I said to them, "Don't watch late-night horror movies."
→.......... I warned them not to watch late-night honor movies.
8. I said, 'Don't touch that switch, Mary."
→...........I asked Mary not to touch that switch.