should.ought to must need 此类词的问句的否定句 各举一例.例如：Must i go out now No,you needn't.

应该是否定回答，如Need I finsh my job? No.you needn't/musn't
Should she give me an answer? No,she needn't
Ought to 在美国英语中，ought to用于否定句和疑问句时，to可以省略。如：
　　Ought you smoke so much? 　　You oughtn't smoke so much.
Ought to 一般用于肯定和否定句 希望能帮到你，祝学习进步，更上一层楼O(∩_∩)O

Shall I wear this dress for the party? No, you shouldn't it is ugly
how can i improve my English? You musn't be lazy when memorizing vocabs
I want to jump off from the plane. > no, you ought not jump without a parachute

Should I go out now?No,you shouldn't.Ought I go out now?No,you ought not to be.ought to 其实极少用於疑问句.must 例已举.Need I go out now?No,you needn't./ No,you don't have to.