情态动词may和might和would的用法
may/might
表示请求、允许 might不表示过去，仅表示语气更加委婉、客气。
表示可能性 表示把握性不大的推测，不用于疑问句中；might表示的可能性比may更小。
表示祝愿 may可以用来表示祝愿，但句子要用部分倒装。
固定用法 may/might as well do sth.“不妨做某事；还是做某事为好”。
Might I make a suggestion? 我能提个建议吗？
This coat may be Peter’s. 这件外套可能是Peter的。
He might be doing his homework now. 他现在可能在做作业。
May you succeed! 祝你成功！

人教版高中英语单词
初中英语教材人教版
高中英语课本人教版

注意

may表示请求许可时，其否定回答一般用mustn’t。may not意为“可能不”，而can’t意为“不可能”。
—May I use your computer? 我能用一下你的计算机吗？
—Yes, you may.(No, you mustn’t.) 是的，你可以。（不，你不可以。）

will和would
用于第二人称作主语的疑问句表示请求。
表示意志、决心或愿望。
表示客观上的习惯，will表示现在，would表示过去。
表示推测或猜想。
表示按规律“注定会”。
Will you help me with the luggage? 你能帮我拿一下行李吗？
Would you pay me in cash, please? 您能付我现金吗？
They asked if we would do that again. 他们问我们是否能够再做一遍。
Oil will float on water. 油能够漂浮在水上。
辨析
would 表示过去的习惯时仅指动作，而且不与现在作对比。
used to 表示过去的习惯动作或状态，而且与现在作对比，说明现在这种动作或状态已经不存在。
In those days he would sit silently at the door for hours. 
这些日子，他总是安静地坐在门口，一坐就是几个小时。
He used to swim in the little river when he was a boy. 
他还是小男孩儿的时候，常常在这条小河里游泳。

Every day we go to school and listen to the teacher，and the teacher will ask us some questions．Sometimes，the classmates will ask your opinions of the work of the class．When you are telling others in the class what you have found out about these topics，remember that they must be able to hear what you are saying．You are not taking part in a family conversation or having a chat with friends---you are in a slightly unnatural situation where a large group of people will remain silent，waiting to hear what you have to say．You must speak so that they can hear you---loudly enough and clearly enough but without trying to shout or appearing to force yourself．
Remember，too，that it is the same if you are called to an interview whether it is with a professor of your school or a government official who might meet you．The person you are seeing will try to put you at your ease but the situation is somewhat different from that of a ordinary conversation．You must take special care that you can be heard．
1．When you speak to the class，you should speak ______．
A．as slowly as possible     B．in a low voice    C．loudly     D．forcefully
2．Usually，when you speak to the class，the class is _______．
    A．noisy                B．quiet         C．having a rest   D．serious
3 The situation in the class is ______ that in your house．
    A．not very different from                B．sometimes the same as   
C．sometimes not the same as             D．not the same as
4．If you are having a conversation with an official，the most important thing for you is ______．
A．to show your ability                  B．to be very gentle  
C．to make sure that you can be heard      D．to put the official at ease
5．The main idea of this passage is ______．
A．that we should talk in different ways in different situations  
B．that we must speak loudly
C．that we must keep silent at any time
D．that we must talk with the class

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