与将来相反的虚拟句,从句谓语用weretodo,主句woulddo.那么下面这句话iweretostayathomeifitwouldraintomorrow.前面不应该是主句用would后面if才是从句用wereto怎么反过来了还是我哪里弄错了

　　与将来相反的虚拟句,从句谓语用weretodo,主句woulddo.那么下面这句话

　　iweretostayathomeifitwouldraintomorrow.

　　前面不应该是主句用would后面if才是从句用wereto

　　怎么反过来了还是我哪里弄错了