1.What did you used to do when you were five years old?
2.I really worry about the maths test of tomorrow
3.He was watching me all the time,and would always be proud about everything good I did.
4.Don't go to sleep with TV open.
5.Are you interested in football?
6.I never talk with others on Internet.
7.Tina's mother couldn't continue to afford to her education.
8.I can not stand it any more(any longer)