If you don't want to get lost,you'd better ask for the way.那个you后面是不是had,如果是那为什么它要用过去式.

问题描述:

If you don't want to get lost,you'd better ask for the way.那个you后面是不是had,如果是那为什么它要用过去式.

是had,不过那并非真正意义上的过去式,而是固定表达发中的一部分:
had better do
最好做某事