You'd better go now中的You'd是wold better 还是had better的缩写?

问题描述:

You'd better go now中的You'd是wold better 还是had better的缩写?
这个简单句是虚拟语气,所以我推测它是would better,不过读起来不太顺

当然是You had better go now. 表示你最好现在走吧.