1 I can swim.
2 You must phone Martin.
3 Ann might be here this evening.
4 You don't have to wait.
5 People shouldn't watch TV all the time.
6 Shall I open the window?
7 People should help each other.
8 John used to eat junk food when he was younger.
9 It may rain.
10 Alan can speak Spanish.
11 Can you help me?