Вопросительные:
1)Can i come up?
2)Can you hear me?
3)Can i ask you?
4)Can i go for a walk?
5)Can i go?
Положительные:
1)I can help you
2)I can do it
3)I can make you happy
4)I can think of this
5)I can leave
Отрицательные:
1)I can't do it
2)I can't understand
3)I can't talk
4)I can't speak English
5)I can't find