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1.与现在事实相反 If I were you，I should(would，could，might)tell him the truth. 要是我是你，我就会告诉他真相了。(事实上我不是你) 2．与将来事实相反 If it were to rain/should rain/rained，the crops would be saved.要是能下雨的话，庄稼就能得救了。 3．与过去事实相反 If you had taken my advice，you wouldn't have failed in the exam.如果你听了我的建议，你就不会考试不及格。(事实上你根本没听我的) 4．错综时间条件句 当条件状语从句表示的行为和主句表示的行为所发生的时间不一致时，被称为“错综时间条件句”，动词的形式要根据它所表示的时间作出相应的调整。 If you had listened to me，you wouldn't be in such trouble now.如果你听了我的话，你现在也不会有这样的麻烦了。(从句说明过去，主句说明现在) 5．条件从句中的谓语部分有were，should或had时，if有时可以省略，这时从句要用倒装语序。 Were I you，I would do it in another way. 如果我是你的话，我就用另外一种方法做。 Should I have time，I would help Tom with his maths.我要是有时间就帮汤姆学数学。 三、虚拟语气在宾语从句中的应用 1．动词wish后的宾语从句 I wish it were spring in my hometown all the year round.但愿我的家乡四季如春。 I wish I had met him yesterday. 我昨天能遇到他就好了。 I wish (that)＋ 从句 一般过去时(be用were) 表示对现在的虚拟 would/could＋动词原形 表示对将来的虚拟 过去完成时 表示对过去的虚拟 2．在表示坚持、命令、建议、要求等动词后的宾语从句中，谓语用“should＋动词原形”，should可省略 一坚持：insist 二命令：order，command 三建议：suggest，propose，advise 四要求：request，require，demand，ask She asked that she be kept informed of developments. 她要求继续向她报告事态发展情况。 The doctor advised that he(should) change his job. 医生劝他换工作。 | 
