may提問的肯定回答是：yes,you can.或者,yes,please.否定回答是，no,you can't.不要用must提問，如果要表達(dá)那個意思，你可以這樣說：Do you have to...can提問的肯定和否定回答同may一樣。yes,you can.&no,you can't.

may和might用法的區(qū)別

might后接動詞的完成式，除表示對過去的推測外，還有以下用法(不用may)：

1、表示過去某事可能發(fā)生而實際上卻并沒發(fā)生：

A lot of men died who might have been saved．

很多人本來可以獲救的卻死了。

It was really very dangerous. I might have killed myself.

那真的是太危險了，我差點沒命了。

2、表示委婉的批評或責(zé)備：

You might have made greater progress.

你的進步本來可更大一些的。

You might at least have answered my letter.

你至少可以回我一封信嘛。