一般情况下，如果不是经常讲的状语从句，你就把这种例子记住就好了，不会太多。It is time that sb did sth.It is high time that sb did/should do sth.would rather do sthwould do sth rather than do sthwould rather sb did/ had done sth 这句是根据时态来判断的。
