精选优质文档-倾情为你奉上 U4情态动词1情态动词的意思：can, could 能，会；may, might也许；must 必须； have to 不得不。2. must和have to的区别：must（主观愿望）必须做某事，have to（客观情况迫使）不得不做某事；3. 记住问答不一的情况： 1) May I ? 肯定：Yes, you may. 否定：No, you cant. / mustnt. 2）Must I ?肯定：Yes, you must.否定：No, you neednt. / dont have to.三、自我检测：1. May I take this book out? No, you _. A. can B. mustnt C. neednt D. arent2. Im very tired. I _ walk any farther.A. cantB
