为什么What can you expect to learn from sitcoms?里的can不能do?

为什么We can do what we can to help you . You can can what you can can,and you can eat what you can't can. can you tell me what's thematter with you?为什么不用what thematterwith you is Can you guess what , what can you What can you do? What can you see what can you what can you do? What can you do What can you learn what can you cook? What can you cook? what()can you sing What can you play What can you see? what can you doing? what can you collect