Переделать в отрицательную форму our friends can ski and skate well. you may take my bag. they must get up early. i can swim well. he may come in. you must read many books. mary can play the piano. my cat can climb the tree. you may invite your friends. we must go there.

Our friends can't ski and skate well. You may not take my bag. They mustn't get up early. I can't swim well. He may not come in. You mustn't read many books. Mare can't play the piano. My cat can't climb the tree. You may not invite your friends. We mustn't go there.