1、n if 从句 主句n过去 had done would(should,could,might)+have donen现在 did/were would(should,could,might)+动原n将来 did,were to,should+v.,同上 Supposing there were no gravity,objects would not fall to the ground when dropped.n She wasnt feeling very well.Otherwise she wouldnt have left the meeting so early.nShe wo
2、uld leave her husband except for children.4）含蓄虚拟条件句）含蓄虚拟条件句 1).wish后面宾语从句中的虚拟语气，表示与事后面宾语从句中的虚拟语气，表示与事实相反的愿望。其表达形式一般是将从句的谓实相反的愿望。其表达形式一般是将从句的谓语动词退后一个时态。例如语动词退后一个时态。例如:与与现在现在事实相反事实相反:wish+(that)+did(were)I wish I were as healthy as you.I wish that I had a plane.与与过去过去事实相反事实相反:wish+(that)+had doneI wis
3、h I had been to the concert last night.I wish you had written to him.与与将来将来事实相反事实相反:wish+would/could/might+doI wish he would forgive me.6 It is(high,about,low)time that一般过去时一般过去时should+动词原形动词原形此处的此处的should一般不省略一般不省略注意注意:It is the first time that从句从句 现在完成时现在完成时It was the first time that从句从句 过去完成时过去完成
4、时It is time for us to have dinner.It is(about/high)time that we had dinner.It is the first that he have gone there.It was the first time that he had gone there.if only过去完成时过去完成时一般过去时一般过去时 对过去虚拟对过去虚拟 对现在虚拟对现在虚拟could+完成时完成时8 if only 从句从句if only 若是若是.那该多好啊那该多好啊;真希望真希望.;只要只要.就好就好1.If only Marx were stil
5、l by my side to see this with his own eyes.2.If only she could have lived a little longer.If only she had lived a little longer.3.If only he had arrived in time.would/could/might+动词原形动词原形对将来虚拟对将来虚拟 9 用在用在lest(惟恐惟恐,免得免得),for fear that(以免以免,为防止为防止起见起见)和和in case引导的状语从句中，这时谓语动词用引导的状语从句中，这时谓语动词用should+动动
6、词原形词原形或或动词原形动词原形。1.She closed the windows lest she catch cold.2.He took his raincoat with him lest it should rain.3.She put her coat over the child for fear that he should catch cold.4.Heres some money in case you should need it.lest/for fear that/in case+句子句子(should+动词原形动词原形)模拟题：模拟题：BBBADABACACDBBDCBACACCBBBCACBCBABBBCCBBDCCCADBBCDDBBDBCDBB
