would rather 是用语虚拟语气吗？

would rather宾语从句用虚拟语气。
描述现在或将来：would rather sb。did sth.
描述过去：would rather sb. had done sth.

对，would rather do sth. than do sth.
与prefer to do rather than do 可互换

had rather吧

没错。需要虚拟一下

是的。