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should常译作“应该”，would常译作“愿意；会”。should和would都可用于疑问句，表示征询意见或提建议。但它们比shall和will更委婉。
Would的用法
would最常见的用法是：相对于一个过去时间点的后来“将要”做什么，比如：
He said he would meet me at the station. 他说他会在车站接我的。这句中的 would meet 是相对于said（过去说）之后要做的事情。又如：
She thought she would have to ask someone for help. 她当时想，她得找个人帮忙。
1、（will的过去式，表示过去将来时）将
She said she would come.
她说过她会来的。
2、（表示意志）愿，要；偏要
I told her to stop nagging,but she just wouldn't listen.
我叫她别再唠叨，可她就是不听。
3、（表示过去的习惯）总是，总会
He would sit silent for hours.
他常常接连好几个小时默默地坐着。
4、（表示喜欢、意愿）愿意，要，想
I would like to have a word with you.
我想同你说句话。
5、（表示虚拟、假设、条件等）要，将要；会，就会
If I were younger,I would join you in the expedition to the Antarctic.
如果我年轻些，我就会跟你们一起去南极探险。
6、（表示婉转的请求）请
Would it be convenient for you to leave tomorrow?
明天走你方便吗?
Would you please come tonight?
你今晚来一下好吗?
7、能，能够
The hall would seat one thousand people.
这个大厅能坐一千人。