高二-虚拟语气用法讲解()课件

1、条件句表示主句的条件,分真实条件句 和虚拟条件句 两种。a. 真实条件句 表示条件是真的或有可能实现的, 采用陈述语气。b. 虚拟条件句 表示条件是无法实现或几乎无法实现的, 采用虚拟语气。 Subjunctive Mood 一、用法归纳:虚拟语气在条件状语从句中的用法主从 句构 成时态虚拟条件 从句(if )主 句 与现在事实相反的 假设 与过去事实相反的 假设If + 主语 + did (be用 were)主语 + would/ should/could/ might +do If + 主语 + had done主语 + would/ should/could/ might have do

2、ne 主从 句构 成虚拟条件从句(if)主 句 与将来情况相反的 假设If + 主语 + did If + 主语 +were to do If + 主语 + should do主语 + would/ should/could/ might do时态 三 与将来事实相反从句谓语：主句谓语：If it were Sunday tomorrow, I should go to see a film. If he should have time next Sunday, he would go to visit the Great Wall. If I were to be twenty next

3、year, I could take the course.1）过去时would, should, could, might +动词原形2）should + 动词原形3) were to + 动词原形 四 与过去事实相反从句谓语：主句谓语：If he had come earlier, he would have seen her.had + 动词的过去分词would, should, could, might + have + 动词的过去分词If he had driven more carefully, he would not have had the car accident yest

4、erdayHad I had time, I would have gone to see the film.=If I had had time, I would have gone to see the film.五 在虚拟语气的条件从句中，可以省略if ，但要把状语从句变成一般疑问句语序。_ today, he would get there on Friday.Was he leaving B. If he leavesC. Were he to leave D. If he is leavingC六 有时虚拟语气的条件从句不用if引导，而用but for, without, if o

5、nly, otherwise等词。 But for your help, I couldnt have made such great progress in English. Without air, we couldnt live.3) If only the weather were fine.4) I had been there by taxi, otherwise I would have missed the train.以but for, without开头的句子，谓语动词的形式和if的主句的一致。主、从句的谓语动词的形式都和if从句相一致。以If only开头的句子，谓语动词

6、的形式和if从句的一致。She talked about America as if he had been born there. He sings as though he were a singer.八、由as if或as though引导的状语从句，其谓语动词用过去式或had + 动词的过去分词。1) He appears as though he _ an Italian. A. were B. was C. has been D. be2) It seems as if he _ there yesterday. A. was B. were C. has been D. had

7、beenAD(2) * suggest等 + 宾语从句。这类动词有：order, insist, demand, desire, command, propose, request等。The teacher suggested that our sports meeting (should) be put off till next week. The headmaster ordered that all of the students (should) be here on time. He insisted that we (should) attend the meeting.在宾语从

8、句中，谓语动词用should + 动词原形，should可省略。注意：insist, suggest后接的宾语从句不用虚拟语气的情况。she insisted that she was right.2) The look on his face suggested that he was unhappy.当insist的意思是坚持某人自己的观点时，后接的宾语从句不能用虚拟语气。当suggest的意思是暗示、表明时，后接的宾语从句不能用虚拟语气。My suggestion is that you (should) visit the farm. His idea is that the stud

9、ents (should) make a plan.(3）* 句中有suggestion, plan, idea, order, requirement, motion, recommendation, proposal等名词，其后的表语从句或同位语从句中的谓语动词用(should) + 动词原形。虚拟语气用于表语从句，同位语从句中。名词advice, order, demand, proposal, command, requirement, insistence, suggestion, request等的表语从句和同位语从句要用虚拟语气，其谓语动词的构成是(should) +动词原形We

10、 all agreed to his suggestion that we (should) go to Beijing for our summer vocation.(4）* 记住下面几个句型： natural/important/necessary/impossible surprising/strange/funny/essentialIt is + that requested/suggested/desired/proposed a pity/a matter of regret/a shame/no wonder从句的谓语动词用(should) + 动词原形在主语从句中，谓语动词

11、可以用虚拟语气表示惊奇，不相信，惋惜，理应如此等主观的情感,其谓语动词用(should) +动词原形。1.It is important that we (should) clean the room every day. (necessary, natural, strange, etc. )2.It is a pity that you (should) be so careless. (a shame, no wonder, etc.)3.It is suggested that Miss Liu (should) give a performance at the party.( de

12、cided, ordered, requested, proposed, etc)1. 错综时间条件句If you had listened to me, you wouldnt be in such trouble now.If the doctor had come in time, Amy would still be alive.If he had received six more votes, he would be our chairman now.十 几种特殊情况十一 If 可能被省略,从句要倒装Were she in charge (= If she were in char

13、ge) , she would do things differently.Had I known your address (= If I had known your address) , I would have written before.Should you change your mind (= If you should change your mind), no one would blame you.十三 If only 意为：若是.那该多好啊; 真希望.; 只要, 只要.就好If only I had arrived in time!If only she didnt d

14、rive so fast.If only I were a bird.If only I had taken his advice十四 由so that , in order that 引导的目的状语从句中用虚拟语气,其谓语形式为may (might), can (could)+动词原形.Speak louder so that I can hear you.He got up much earlier this morning in order that he might catch the first bus to the city.I went to the cinema early s

15、o that I could find a good seat.条件句可分为两类，一类为真实条件句，一类为非真实条件句。非真实条件句表示的是假设的或实际可能性不大的情况，故采用虚拟语气。一、虚拟语气在条件状语从句中的用法。虚拟语气常见用法The volleyball match will be put off if it rains.Fact!The weatherman forecasted no rain for tomorrow; but if it should rain tomorrow, they wouldnt go for an outing.二 虚拟语气假设条件句型注意点：1

16、. 非真实条件从句谓语动词发生的时间与主句的谓语动词不一致，叫做错综条件虚拟语气,也称为混合虚拟。主句和从句的谓语动词要依照假设的时间而定。 如果你开车时不是太快，现在你就不会在医院了。 If you hadnt driven too fast , you wouldnt be in hospital now.2.假设条件虚拟倒装。 条件从句中有should， were， had三个助动词可 以把if省略，并将这三个词提至句首。If I were you, I would give it up.Were I you, I would give it up.If you hadnt broken the rule, you wouldnt be in troubles now.Had you not broken the rule, you wouldnt be in trouble now.If it should rain tomorrow, what should we do?Should it rain tomorrow, what should we do? 4. without和but for 构成虚拟条件, “要不是”Without sunlight, peoples life would be different