could和should和would的用法
could是can的过去式 意思是“能/会”一般用于过去时态 should是情态动词 意思是“应该”用于所有时态 would是的过去式 意思是“将/会” 一般用于过去将来时态 还有一种用法 would like to do sth.=want to do sth.意思是“想要做某事” 这三个单词都是+d... 详情
should和would的用法区别
should译作应该，表示义务或推测，如We should protect our environment.(义务)/You shouldn’t know him.(推测)。would译作愿意；会，表示过去的意愿或意志，如She said she would become a volunteer.
should例句
It's very important to me that you should be there.
你应该到场，这对我很重要。
By that time the new system should be up and running.
到那时这个新系统应该会运转起来了。
Give me one good reason why I should help you.
我为什么要帮你？给我一个充分的理由。
She of all people should know the answer to that.
在所有的人中，唯有她最应知道那个问题的答案。
Many people feel that the law should be changed.
许多人都觉得这项法律应该修改。
would例句
It was announced that new speed restrictions would be introduced.
据宣布，将有新的限速规定出台。
He said he would be here at eight o'clock.
他说他将在八点钟到达这里。
I would very much like to see you again.
我很想再见到你。
Take this to the bank for me, would you?
请替我把这送到银行去好吗？
A change of job would do you the world of good.
换一下工作会对你大有好处。
can和could，should，would等词语的用法区别
could 可以 语气较委婉 较轻 should 应该 有点上对下的语气 较强硬。 I wish you would stay. 我希望你能留下来 Used to make a polite request: 用于有礼貌的请求： Would you go with me? 你愿意和我一起去吗? Used to indicate uncertainty: ... 详情
