①I will do everything for you. ②None is so blind as those who won't see.

　　表请求

　　Will/ Would you please close the window？

　　用于疑问句中。would更委婉

　　表示某种倾向或习惯性动作

　　①Fish will die without water. ②Every time she was in trouble，she would turn to him for help. (would指过去某一段时间的情况，常与表示过去的时间状语连用，意为“总是，总会”，后面只能接动作性的动词。)

　　used to表示与现在的情况相反，表示“过去如此而现在不再这样”。其后既可接表动作的动词，也可接表状态的动词。如：There used to be an apple tree in front of the house.

　　4.shall/will/would情态动词 意义

　　例句

　　备注

　　will/would 表示功能(能，行)

　　①If you don't have a pen, a pencil will do.②We tried the door again，but it wouldn't open.

　　与否定词连用常表示“拒绝”。

　　表示推测(可能、大概)

　　①This will be the house you are looking for. ②I would be about ten when my father left home.  

　　情态动词＋have done 情态动词 意义

　　例句

　　备注

　　must have done；may/might have done；can/could have done 一定(肯定句)；可能(肯定句和否定句)；可能(疑问句和否定句) You can't/couldn't have met my grandmother. She died before you were born.

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