最佳答案:yes,you can./no,you can't.yes,you must./no,you needn't.yes,you need(must)./no,yo
最佳答案:must-Yes,you should./No,you needn't.need-Yes,you should/may/can/need./No.you nee
最佳答案:may:yes,you mayno,you can'tmust:yes you mustno you needn't
最佳答案:Shall we go to the park?Sorry, I won'tSorry, I am afraid I can not.Sorry, I shal
最佳答案:情态动词有can (could), may (might), must, have to, shall (should, will (would), dare
最佳答案:Is this your cousin?no it isn't
最佳答案:Must I do that?Yes,you must; No,you needn'tNeed I do that?Yes,you must; No,you n