摘要：情景 条件从句的谓语动词 主句的谓语动词 与现在事实相反 动词过去式 should +动词原形 would 与过去事实相反 had +过去分词 should +have+过去分词 would 与将来事实相反 1.动词过去时 2.should +动词原形 3.were to +动词原形 should +动词原形 would 注:如果条件从句谓语动词包含有were或had, should, could有时可将if省去, 但要倒装.如: Had you invited us, we would have come to your party. 2. 虚拟语气在各种从句的应用 (1) 在主语从句中用来表示惊奇.惋惜.理应如此等.其谓语形式是"should +动词原形".常用于以下三种句型中. 句型一:It is necessary (important, natural, strange, etc) that- 句型二:It is a pity (a shame, no wonder, etc) that- 句型三:It is suggested (requested, proposed, desired, etc) that- 如: It is strange that he have done that. It is a pity that he be so careless. It is requested that we be so careless. (2) 在宾语从句中用于suggest, propose, move, insist, desire, demand, request, order, command等动词后的宾语从句中.表间接的命令和建议.其谓语形式是"+动词原形".如: I suggest that we go swimming. (3) 在表语从句中.表示间接的命令.要求.请求.建议.决定等.主句中的主语通常是suggestion, proposal, request, orders, idea等.从句谓语形式是"+动词原形".如: His suggestion is that we leave at once. (4) 在同位语从句中.谓语形式是"+动词原形".如: We received order that the work be done at once. (5) 在It is time that-句型中.其谓语动词形式是"动词的过去式"或 "should +动词原形",should不可省.如:It's time we went to school.

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