Question

虚拟语气的用法中，should和would用什么区别

好像很多时候都可以通用吧？

Answer 1

should 本应该做某事却没有做,表示责备和遗憾.
如; You should ahve told me the news eariler.
would 表示与事实相反。
1。If I were a bird, I would be happy.(与现在事实相反)
2. If I had told him the news, he would have cried..(与过去事实相反)
3. If I were to go tomorrow, I would take a plane..(与将来事实相反)

Answer 2

虚拟语气中，一般是用should be+动词原形结构。
would一般不用于虚拟语气

Answer 3

should 有应当做却没做的意思,would有假如情况有变动,就会做的意思

Answer 4

I should have seen him off.我本应该去为他送行的.
If I were ten years younger,I would go abroad with him.
我如果年轻十岁就会跟他出国了.

should本应该做某事却没有做到,表示遗憾.
would表示如果情况发生变化,主语就会做某事.