题目内容
7. If we last year,we could have gained a good harvest. (have)
如果我们去年雨水充足的话,我们就会获得大丰收。
7. had had enough rain考查虚拟语气的用法。在虚拟语气中,对过去事实的虛拟,从句中用过去完成时。虚拟语气条件句中,对过去事实的虚拟,主句用would / should / could / might have done,从句用过去完成时;对现在事实的虛拟,主句用would / should / could / might do,从句用一般过去时/were;对将来事实的虛拟,主句用would / should / could / might do,从句用一般过去时/were / were to do / should do。
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