may提問(wèn)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(wèn)，如果要表達(dá)那個(gè)意思，你可以這樣說(shuō)：Do you have to...can提問(wèn)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(dòng)詞的完成式，除表示對(duì)過(guò)去的推測(cè)外，還有以下用法(不用may)：

1、表示過(guò)去某事可能發(fā)生而實(shí)際上卻并沒(méi)發(fā)生：

A lot of men died who might have been saved．

很多人本來(lái)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(xiǎn)了，我差點(diǎn)沒(méi)命了。

2、表示委婉的批評(píng)或責(zé)備：

You might have made greater progress.

你的進(jìn)步本來(lái)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。