1、would用在陈述语气中,表示过去将来时,表示有意识的行动或意志,常用于间接引语中,译为“要；偏要；愿”.
I said I would do my best.
我表示过要尽最大努力.
He said he would do me a favor.
他说他愿意帮助我.
2、would用在陈述语气中,表示过去将来时,表示无意识的行动或单纯将来发生的事或动作,指实际情况,译为“将,会”.
He told me he would he free tonight.
他告诉我他今晚有空.
He said he would turn up on time.
他说他会准时出席.
3、would用于表示过去经常性或习惯性的动作.译为“总会,总是”.
Sometimes I would come home late.
有时我总是迟回家.
He would read in the sun.
他过去常在阳光下读书.
注：used to 与would都可指过去的习惯性动作,但used to 侧重于强调状况,would侧重于强调动词的反复.如：
1、他曾经是个不大说话的男孩子.
He used to be a guiet boy.(不能用would)
2、他过去上课老是迟到.
He would be late for class.（也可用used to）
4、would 用于过去的否定句中,表示拒绝,或无此习惯或不可能,译为“不肯,总是不”.
He wouldn't give the names of his partners.
他拒绝讲出他的伙伴们的名字.
5、用于对过去事情的推测,译为“大概”.
That would be in spring 1964.
那大概是1964年春天的事情.
6、Would 表示对感觉的夸张,说明是意料之中的事情.
——Of course, he broke the glass.(当然是他把杯子打破了.)
——Oh, he would .(哦,还会是谁呢.)
7、would = could 译为“能,能够”.
The room would seat 50 persons
这房间能穿纳50人
8、用于虚拟语气的主句中.
If I were your, I would quit smoking.
If you were a bird, you would fly.
9、用于虚拟语气,表示强烈愿望,译为“但愿,要是……多好”.
Would (that) I were a superman.
我要是超人那该多好啊.
10、表示要求、邀请、希望或询问,其后常接like, love, prefer, mind等动词.
Would you please show me the way?
请你指点指点路线好吗?
Would you like to go shopping with me?
愿和我一起去购物吗?