虚拟语气 虚拟语气表示说的话不是事实，或者是不可能发生的情况，而是一种愿望、建议或与事实相反的假设等。一般常用于正式的书面语中： 虚拟语气在条件句中的用法 表示与现在事实相反，谓语动词的主要形式如下： 条 件 从 句 主 句 动词过去式（be的过去式一般用were） would (should, could, might)＋动词原形 If I were you, I shouldn’t do that. We would go with you if we had time. We could ask him if he were here. If I knew his telephone number, I would ring him up. 表示与过去事实相反，谓语动词的主要形式如下： 条 件 从 句 主 句 had ＋过去分词 would (should, could, might)＋have＋过去分词 If he had seen you yesterday, he would have asked you about it. If you had come earlier, you would (might) have met him. I should (would) have called you if I had known your telephone number. 3．表示与将来事实可能相反，谓语动词的主要形式如下： 条 件 从 句 主 句 动词过去式或should ＋ 动词原形或were to ＋ 动词原形 would (should, could, might)＋动词原形 If it should rain, the crops would be saved. If it were to snow tomorrow, they would not go out. ※ 在实际运用中，主句中的谓语和条件从句中的谓语动词所发生的时间往往不一致，这时应作相应的调整： If he had followed the doctor’s advice, he would be all right now. If it should be fine tomorrow, we should have bought the ticket yesterday. ※ 有时条件从句可用介词短语或分词短语所替代，如： Without our Party, we could not live a happy life. The boy would have died but for the doctor. Given more time, I could have finished the work remarkably. ※ 虚拟条件句往往可以省略if, 采取将had, should, were提到句首的倒装句式表达。如： If he were here, he would help you. >>> Were he here, he would help you. If you had asked him for it, he would have given it to you. >>> Had you asked him for it, he would have given it to you. If you should go there tomorrow, you could have a good time. >>> Should you go there tomorrow, you could have a good time. 二、一些“should ＋ 动词原形”虚拟语气的用法 在动词suggest, order, demand, propose (建议), prefer, request, urge (力劝、竭力主张), desire (愿望), insist, decide, require, advise, command (命令、指挥), arrange等后面的宾语从句中，一般用 “should ＋ 动词原形”（should往往可以省略）。如： I suggest that we (should) hold a meeting tonight. He ordered that all (should) take part in the work. They insisted that we (should) begin the work at once. ※ 当insist作“坚持（认为）、坚持（应该）”解时才用虚拟语气，而作“力言、强调”解时不用虚拟语气；当suggest作“建议”解时才用虚拟语气，而作“暗示、表明” 解时不用虚拟语气。这两个动词比较特殊。试比较： Mike insisted that we (should) go with him. Mike insisted that he had never stolen the bike. He suggested that we (should) have another try. His smiling face suggested that he was satisfied with my answer. 2．在名词suggestion, order, proposal, plan, desire, request, decision, idea, advice等之后接表语从句或同位语从句时，也应该用“should ＋ 动词原形”。如： The decision that we should build another new school made us very happy. My suggestion is that we should go outing next Sunday. 在It ... ...
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