You'D better go home now 中'd是HAD还是would的缩写?

问题描述:

You'D better go home now 中'd是HAD还是would的缩写?
不过好像两种都有,那怎么区分?我感觉这里应该是WOULD吧,最好现在走!
I'd like to go.这里'D是would吧?

had,固定词组had better do
最好做……
下面一个是would like to do
愿意做……