保证语法的较高正确率是能否取得AEIS高分的第一步，没有语法做前提，拿高分只是痴人说梦。在AEIS考试中，虽然单独来看，语法专项的分数值并不高（P2P3组别语法专项5分，P4P5组别14分，中学组语法专项分别都是10分），但是众所周知的是，语法贯穿了所有英文学习。下面课窝网将要精讲关于AEIS核心语法知识点：动词的语气。

　　动词的语气

　　语气有三种:陈述语气,祈使语气和虚拟语气.语气表示说话人对劝词所示示的动作或所处的状态持有的态度或看法.

　　1.辨别if引导真实条件句和if引导的虚拟条件句的区别

　　If he has time, he will go with us.= Probably he hastime and will go with us.

　　If he had time, he would go with us.=But in fact hehas no time.

　　2.虚拟条件句中主句和从句的谓与动词构成形式如下表

　　3.混合时间的虚拟语气

　　如果条件句中的动作和主句的动作不是同时发生，主句和从句的谓语动词的形式应分别根据各自所表示的时间加以调整。

　　1)0If I had received the passport yesterday, I wouldstart today.

　　2)If he had telephoned me last night, I would seehim now.

　　3)If he had followed the doctor’s advice, he would be all rightnow.

　　4)If China had not been liberated, the workingpeople would still be leading a miserable life.

　　4.should/could / might/ ought to + have done表示“过去本应该/可以做而实际上却没做”

　　needn’thave done表示“过去没必要作而实际上做了”

　　5.虚拟语气中的倒装句

　　如果虚拟语气的条件从句谓语动词中含有were, had, could, should，有时可将if省去，而将条件从句的主语置于were, had, should, could之后。

　　Had you invited us, we would have come to yourparty.

　　Were I you, I would do more practice after class.

　　Could she lend us a helping hand, she would do so.

　　6.wish后面的宾语从句的谓语动词应使用虚拟语气，表示“可惜…；….就好了； 悔不该…； 但愿…。”

　　1)I wish I knew the key to the answer.

　　2)I wish I were ten years younger.

　　3)I wish that I had gone to the football match lastweek.

　　4)I wish that you had been here yesterday.

　　5)He wishes that we would visit the old school.

　　7.表示命令或建议动词suggest,insist, propose, desire, demand, request, order, command后的宾语从句中应使用虚拟should +动词原形；should不可用would来替代;主句所使用的动词时态不限。

　　8.suggest为“建议去做…;命令…”从句用should + do

　　为“ 说明； 暗示”,从句用过去时或过去完成时。

　　1) The doctor suggested that I should take themedicine three times a day.

　　2) The doctorsuggested that my grandmother had caught a bad cold.

　　9.insist“坚持要去做…，坚持应该去做”，从句用should + do为“坚持表明，坚持说/解释”， 从句用过去时或过去完成时。

　　10.虚拟语气也用于表语从句和主语从句中，表示间接的命令、要求、请求、建议、决定等，主句的主语通常是suggestion, proposal, request, order, idea等。表语从句中的谓语动词是should +动词原型，should可以省略。

　　11.在主语从句中，当从句用来表示惊奇、不相信、惋惜等，从句的谓语动词用需拟语气形式。其谓语动词时should +动词原型， 或should省略。

　　以上就是小编为大家整理的关于新加坡AEIS语法知识点动词的语气讲解。更多AEIS考试报名时间、AEIS考试教材等问题可以咨询我们。