Everyone here can speak English. ---Could I have a look at your notebook? ---Yes, you can. / No, you can't. It can’t be Mary. She has fallen ill. Can this news be true? Where can they be? She can’t have left school, for her bike is still here. The monkeys look sweet, but they can be very naughty. She can / is able to sing the song in English. I could read when I was four. The fire spread through the hotel quickly but everyone was able to get out.