牛津高中英语选修六unit 1 语法讲解:虚拟语气

牛津高中英语选修六unit 1 语法讲解:虚拟语气
牛津高中英语选修六unit 1 语法讲解:虚拟语气

高中英语语法讲解:虚拟语气

一、概述:

1.虚拟语气用来表示一个说法并非真实情况,而是说话人的想象假设或主观建议。

2.与虚拟语气相对应的是陈述语气,表示该说法是真实的,符合现实的,用于陈述句、疑问句、感叹句

等。

3.虚拟语气的构成有两种:

(1) (should) do

(2) 时态倒退

与现在事实相反:一般现在时do→一般过去时did;be动词(am/is/are) 都变were

与将来事实相反:一般将来时will do→过去将来时would do

与过去事实相反:一般过去时did→过去完成时had done

二、使用虚拟语气的11种情况

1.表示“建议、命令、要求、坚持”的词+ should 虚拟语气, 表示“应该做某事”,should 可省略。

常见此类单词有:suggest/suggestion, advise/advice, recommend/recommendation, propose/proposal, order/command/demand, urge, require/request, insist等。

He made a suggestion that TV series (should) not take up too much of students' time.

It was demanded that a doctor (should) be called in immediately to save the general's life.

注:(1) suggest意为“暗示、表明”(2) insist意为“坚持说、坚持认为”时,后加陈述语气,表示真实情况。

What he said suggested that he wasn’t in favor of watching too much TV.

She insisted that she was (be) right and (should) not be punished (not punish).

2.在句型It's important/vital/necessary/essential/natural/a pity/shame/strange/... that...中用should虚拟语气,表

示“应该/竟然做事某”,should一般不省。

It is important that the explosive device should be removed quickly.

Is it necessary that the boy should be forbidden from going out?

It is strange that she should greet us with a smile.

It is a pity that he should not live up to our expectations.

It is natural that they should congratulate you on your success.

3.in case/for fear /lest引导的状语从句中,用should虚拟语气,表示“以防、万一”

Take an umbrella with you in case it should rain.= in case it rains.

She examined the door again for fear that a thief (should) come in.

He set off early lest he (should) be late for the appointment.

4.在句型It's (high/about) time that...中,既可以+should虚拟语气,should不可省略;也可用时态倒退,表

示“是做某事的时候了”

It’s (high/about) time that we showed/should show them around our campus.

注:区别“那是某人第几次做某事”句型,该句型表示真实情况,that从句用完成时。

It is the first/second time that he has come first in the exams.

It was the last time that Tom had seen his wife.

5.wish引导的宾语从句中,用时态倒退表示虚拟语气。

I wish I were a bird.

They wish the star would remain silent in tomorrow's press conference.

How I wish I had followed the teacher's advice!

注:if only +句子,意为“但愿,要是...就好了”,与I wish宾语从句意思相近,用法一致。

If only I were a bird!

If only my fiancée hadn't boarded the Titanic!

6.would rather/sooner 引导的宾语从句中,用时态倒退表示虚拟语气,意为“宁愿”

I would rather you were not my father

I'd rather you hadn’t adjusted the height of the chair last time.

I would rather you came today/tomorrow.

注:would rather与现在/将来相反都用一般过去时

7.as if /though引导的状语从句中,用时态倒退表示虚拟语气,意为“似乎、好像”

They treat me very well as if I were their son.

They talked happily as though they had known each other for years.

She packed lots of clothes as if she would live in New York for months.

注:当as if /though 表示真实迹象时用陈述语气。

Look at the clouds. It looks as if it ______(be) going to rain.

8.if条件状语从句中的虚拟语气用法:if从句中用时态倒退,主句中用情态动词过去式+动词,具体见下

表。

If I knew (know) the answer, I would not ask you now.

If I were (be) you, I would adapt to the life here soon.

If they had come (come) last night, they would have seen him.

It is still summer now. If it snowed/ should snow/ were to snow (snow) tomorrow, I would call you Dad.

If it had not been (not be) your he lp, I wouldn’t have accomplished success.

注1:错综时间条件句:if条件句中,会出现if从句的动作的时间与主句动作时间不一致的情况(如if从句与现在相反,而主句与过去相反等),这种句子称为“错综时间条件句”,从句与主句中的动词要根据各自时间做不同表达。

If I were (be) you, I would have run off with her last night.

If I had worked hard at school, I would be an engineer too.

If you had reviewed the lessons last night, you would pass the exam this afternoon.

注2:if虚拟语气从句的倒装:step1从句中去掉if, step2 助动词(were/had/should)提到句首,主句不变。

_________________________, I would adapt to the life here soon.

________________________________, they would have seen him.

___________________/_____________________, I would call you Dad.

难点:(1)能够默写表格,主句从句不要混淆(2)根据语境,把握时间点,分清主句/从句到底与哪个时间的事实相反

9.含蓄/隐含虚拟语气:表示假设的虚拟有时可以借助with (如果有),without(如果没有),but for (要

不是),otherwise/or else(否则)等词表达,可与if条件句的虚拟进行转换。

What would you do with a million dollars?

Without electricity, what would our life be like?

But for Thomas Edison, many things we have now would not be around.

I was ill that day. Otherwise, I would have taken part in the sports meeting.

She didn't know that he was a cheat, or (else) she wouldn't have given him the money.

Without/But for/If it had not been for/Had it not been for your help, we couldn't have finished the task on time.

10.情态动词的虚拟:情态动词过去式+have done

could have done过去本有能力做某事但没做

should/shouldn't have done过去本应该做某事但没做/过去本不应该做某事但做了

needn't have done 过去本不必做某事但做了

would have done过去本会做某事但没做

might have done过去本可能做某事但没做

类似:would like/love to have done 过去本想要做某事但没做

had wanted/hoped/meant/intended to do过去本打算做某事但没做

11.虚实结合”的情况:句子既包含虚拟语气又包含陈述语气,要分清到底是真实情况还是非真实情况,

相应使用虚拟语气或陈述语气。

I was ill that day. Otherwise, I would have taken part in the sports meeting.

She didn't know that he was a cheat, or she wouldn't have given him the money.

He would have given more help, but he was so busy.

Tom would buy the guitar, but he has no money.

If I hadn’t been lucky to meet you, I really don't know what I would have done.

Were it not for the fact that you are ill, I would ask you to do the job right now.

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