can的否定形式(can否定形式。)

1. can的否定形式是can't.例句Can you swim?肯定回答是Yes,I can.否定回答是No,I can't.肯定句子是I can swim.否定句为I can't swim.2.can作为情态动词是会，能够的意思。它的否定是can't. may可以.否定是mustn't.must是必须的意思否定是needn't.3.多读多练。