情态动词--would的用法,

would
1）表意愿。
They would not let him in because he was poorly dressed. 他们不让他进去因为他衣着破旧。
I said I would do anything for you. 我说过我愿意为你做任何事。
2）表委婉地提出请求、建议或看法。
Would you like another glass of beer? 再来杯啤酒好吗？
Would you mind cleaning the window? 请把窗户擦一下好吗？
They wouldn´t have anything against it. 他们不会有什么反对意见。
3）表过去反复发生的动作或过去的一种倾向。
Every time she was in trouble, she would go to him for help.
她每遇到麻烦都会向她求助。他告诉我盒子打不开了。
will和would
注意：
1）would like； Would like to do = want to 想要，为固定搭配。
Would you like to go with me?
2）Will you…? Would you like…? 表示肯定含义的请求劝说时，疑问句中一般用some, 而不是any。
Would you like some cake?
3）否定结构中用will，一般不用would, won't you是一种委婉语气。
Won't you sit down?
would的用法
would是will的过去式，Would you～？作为情态动词，表示“可以请你～吗？”
1. would的用法（请记住以下几个句型）
Would you have a cup of tea？
可以请你喝杯茶吗？
1.Would you～？和Will you～？
这两个句型皆表示客气的请求、劝说……，但Would you～？更客气些。
Would you tell me the way to the station？
劳驾，您能告诉我去车站怎样走吗？
（回答同《Will you～？》句型）
2.主语+would like to～
表示“想要……”的意思上，与…want to～意思一 样，但用此句型较客气。
I want to ask you a question.
=I'd（I would）like to ask you a question.
我想问你一个问题。
3.Would you like～？
表示请求、劝说，是很客气的说法。
Would you like a cup of tea？
您愿意喝杯茶吗？
Would you like to sing a song？
请唱首歌好吗？
最基本的虚拟语气句型:
主句用would/ should/ could/ might +动词原形。
would have done
将做

你好
下面我说一下
1) 用于提出提议或邀请
例：Would you like to change a seat? It's warmer here.（您要不要换一下座位？这里暖和些。）
Would you prefer a hardback edition?（您要不要买一本精装本？）
2) 用于提出客气的要求或请求：
例：I would like you to fetch that document for me now.（我想请你现在就帮我把那份文件取来。）
I would like to know more about your plan.（我想更多地了解一下你的计划。）
3) would you mind + doing句型通常用于表示请求对方做一件有一定麻烦的事情，语气一般都非常客气。注意回答时通常是肯定的，以表示愿意做所要求的事情。
例：Would you mind filling in this form?（请您填一下这张表。）
Would you mind repeating what you just said?（请把刚才的话重复一遍好吗？）
4) 用于委婉地表示自己的意见：
例：I would think the journey will take something like two weeks.（依我看，这次旅程大约需要两个星期。）
I would look at the problem a little differently.（我对这个问题的看法略有不同。）
5) 用于表示过去经常性的行为或动作：
例：The retired captain would sit hours on end watching ships sailing past.（退休的船长经常坐在海边观望过往的行船，一坐就是几个小时。）
He would go to bed strictly at 9, and on Sundays would not have lunch anywhere except in that restaurant.（他总是严格地9点上床睡觉。星期日总在那家饭店吃午饭。）
ps.情态动词will与would的用法
2009-02-26 18:23will, would是英语中使用频率极高的两个情态助动词。两词之间的内在联系(would是will的过去式)决定了它们功能含义的相似性。在掌握其共性特征的基础上,了解其特殊性,是掌握两词的捷径。
一、will,would表示不同时间但功能含义相同的情况：
1. 用于构成将来时态,表示"将会、将要"。
1)will可以构成一般将来时、将来进行时、将来完成时以及将来完成进行时。
By this time tomorrow, you will have reached New York. 到明天这个时候你就已经到纽约了。
2)would可构成过去将来时等过去将来时态。
He said the weather would turn out fine the next day. 他说第二天天气会转好。
2. 表示主语的意愿,有"愿意、会" 之意。
1)will表示现在或将来的意愿。
If you will help me now, I'll surely help you sooner or later. 要是你现在愿意帮我,我迟早也会帮你。
2)would表示过去的意愿。
However I tried, he just wouldn't listen. 不管我怎样努力,他就是不听。
3. 表示习惯性、倾向性,有"惯于(做某事)" 之意。
1)will表示现在的习惯、倾向。
Sometimes he will tell lies. 有时候他也会说谎。
2)would表示过去的习惯、倾向。
Every day he would get up at six o'clock. (以前)他每天早晨六点钟起床。
4. 表示主语的功用、能力。
1)will表示现在的功用、能力。
This room will (=can) hold 60 people. 这个房间能容纳60人。
2)would表示过去的功用、能力。
He said the box wouldn't open. 他说那盒子打不开。
二、Will / Won't you...?与Would / Wouldn't you...?都可表示现在或将来的请求、建议,但would表示的语气更委婉。
Will / Would you please stand there? 请你站在那里好吗？
Won't you come here? 你过来好吗？
三、will,would各不相同的特殊用法：
1. will的特殊用法：可用于第二人称陈述句,表示说话人的建议、命令,有"应该、必须"之意。
You will act at once. 你应该马上行动。
2. would的特殊用法
1)构成虚拟语气。
If he were here, I would tell him the truth. 如果他在这里,我就会告诉他真相。
Had you worked hard, you would have not failed the exam. 要是你努力学习了的话,你就不会考试不及格了。
2)用于构成would like, would rather, would sooner等表达。
I'd rather not go there. 我宁愿不去那里。
3)"would have+过去分词"还可表示过去未曾实现的愿望,有"本想......(却没有......)" 之意。
I would have helped you, but I was too busy. 我本想帮你,可我太忙了。

1.表示过去曾有过的意志、决心
I would do my best.
2.表示请求、愿望、看法等，使语气委婉
would you like tea?
3.过去习惯性动作
He would go fishing on suday.

http://baike.baidu.com/view/190314.htm
情态动词用法，自己看看吧，从来没见过单个情态动词学的...

Would
是will的过去式,可用于各人称,表示过去时间的"意志"、"愿望"和 "决心"等.如：
He declared that he would do everything to help us.他说要尽一切可能来帮助我们.
I told peter that I would go along wit him.我告诉彼得我要跟他一块去.
All in e doctors and nurses told Dr.Bethune not to give his own blood to the wounded,but he wouldn't listen.和护士劝白求恩大夫不要把自己的血输给伤员,但是他不听.
would用来表示现在时间时
这时would不论是表达说话人本身的意志或向对方提出请求,均较will婉转.如：
Would you tell us something about yourself?请跟我们谈谈你自己好吗?
Would you like to have a glass of wine?你要喝杯酒吗?
Would you please tell me the way to the nearest bus-stop?请告诉我去最近的公共汽车站怎么走好吗?
Would you mind helping me with my packing?请你帮我打打行李好吗?
[注]在日常会话中,I would like to和I should like to都可以说,I would like的简略式为I'd like.如：
I should (would) like to have a look at the new television set.我想看看这架新电视机.
I'd like to borrow a copy of Alice in Wonderland.我要借一本《爱丽丝漫游奇境记》.
Would还可以表示过去习惯发生的动作
I found that retired persons would often go to the park to play chess.我发现退休的人经常到公园里下棋.
When he had a problem to solve,he would work at it until he found an answer.当他有个问题要解决时,他总是想办法一直到找到答案为止.

1) 用于提出提议或邀请
例：Would you like to change a seat? It's warmer here.（您要不要换一下座位？这里暖和些。）
Would you prefer a hardback edition?（您要不要买一本精装本？）
2) 用于提出客气的要求或请求：
例：I would like you to fetch that document for me now.（我想请你现在就帮我把那份文件取来。）
I would like to know more about your plan.（我想更多地了解一下你的计划。）
3) would you mind + doing句型通常用于表示请求对方做一件有一定麻烦的事情，语气一般都非常客气。注意回答时通常是肯定的，以表示愿意做所要求的事情。
例：Would you mind filling in this form?（请您填一下这张表。）
Would you mind repeating what you just said?（请把刚才的话重复一遍好吗？）
4) 用于委婉地表示自己的意见：
例：I would think the journey will take something like two weeks.（依我看，这次旅程大约需要两个星期。）
I would look at the problem a little differently.（我对这个问题的看法略有不同。）
5) 用于表示过去经常性的行为或动作：
例：The retired captain would sit hours on end watching ships sailing past.（退休的船长经常坐在海边观望过往的行船，一坐就是几个小时。）
He would go to bed strictly at 9, and on Sundays would not have lunch anywhere except in that restaurant.（他总是严格地9点上床睡觉。星期日总在那家饭店吃午饭。）