A．had been put B．were put C．should be put D．would be put 答案 A
解析 句意为：要是新的安全系统被投入使用了的话，这起事故就不会发生了。此处表示与过去事实相反的情况，所以从句谓语用过去完成时，选A项。 2．—Do you have Betty’s phone number?
—Yes.Otherwise，I ________ able to reach her yesterday.(2017·天津，15) A．hadn’t been C．weren’t 答案 B
解析 句意为：——你有贝蒂的电话号码吗？——有。不然我昨天就联系不上她了。由空前的otherwise及句意可知应用虚拟语气，此处表示与过去事实相反的情况，谓语动词用would have done，故选B项。
3．________ not for the support of the teachers，the student could not overcome her difficulty.
(2017·江苏，22)
A．It were C．It was 答案 B
解析 句意为：如果没有老师们的支持，这名学生不可能战胜困难。此处表示与现在事实相反的假设，从句谓语用were；在非真实条件句中，如果有should，had或were时，可以省略if，而把should，had或were提至主语前，形成部分倒装，故选B项。
4．Without his wartime experiences，Hemingway ________ his famous novel A Farewell
B．Were it D．Was it
B．wouldn’t have been D．wouldn’t be
to Arms.
(2015·重庆，7)
A．didn’t write C．wouldn’t write 答案 D
解析 句意为：要是没有战争时的经历，海明威就不会写出他的著名小说《永别了，武器》。该句使用了含有without的含蓄虚拟语气，由语境知，这里是对过去情况的假设，因此主句谓语用“would/could/should/might＋have done”，故D项正确。
5．It is lucky we booked a room，or we ________ nowhere to stay now.(2015·安徽，
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B．hadn’t written D．wouldn’t have written
32) A．had C．would have 答案 C
解析 句意为：很幸运我们订了一个房间，否则我们现在将无处可住。or引导含蓄虚拟条件句，根据“now”可知，是对现在的情况进行虚拟，因此用“would＋动词原形”，故选C。 6．Ellen is a fantastic dancer.I wish I ________ as well as her.(2015·陕西，23) A．dance C．had danced 答案 D
解析 句意为：埃伦是一位了不起的舞蹈家。要是我能跳得像她一样好那该有多好啊！I wish后接从句，从句用虚拟语气。叙述与现在事实相反的情况时，谓语动词用过去式(be用were)；叙述与将来事实相反的情况时，谓语动词用could/should/would/might do；叙述与过去事实相反的情况时，谓语动词用had done。由语境可知，此处叙述的是与现在事实相反的情况，故谓语动词用过去式，选D项。
7．We would rather our daughter ________ at home with us，but it is her choice，and she is not a child any longer.(2014·陕西，23) A．would stay C．stayed 答案 C
解析 would rather后跟宾语从句时，从句用虚拟语气，从句用虚拟语气，即从句谓语动词用过去式表示与现在或将来事实相反；用“had＋过去分词”表示与过去事实相反。根据后一句中的is可知，此处表示与现在或将来事实相反，故此处动词应用过去式，故选C项。 8．It was John who broke the window.Why are you talking to me as if I ________ it？
(2014·重庆，13)
A．had done C．did 答案 A
解析 句意为：是John打坏了窗户。为什么你说得好像是我打坏了似的？题中broke表示“打坏窗户”发生在“过去”。as if/though后面的从句用had done表示对“过去”的虚拟。故A项正确。 考点归纳
1．(1)if条件句虚拟语气
时间
B．had had D．would have had
B．will dance D．danced
B．has stayed D．stay
B．have done D．am doing
虚拟条件句谓语动词 主句谓语动词 10
与过去事实相反 与现在事实相反 had done did/were did/were would/could/might have done would/could/ might do 与将来事实相反 were to do should do would/could/ might do
If you had come a few minutes earlier，you would have met him. 要是你早来几分钟的话，你就能见到他了。(与过去事实相反) If it were sunny tomorrow，I would come to see you. 明天要是天气好的话，我来看你。(与将来事实可能相反) If I were you，I would go at once.
假如我是你的话，我会马上走。(与现在事实相反，事实上我不可能是你) (2)错综时间条件句
当条件句表示的行为和主句表示的行为所发生的时间不一致时，被称作“错综时间条件句”，动词的形式要根据它所表示的时间做出相应的调整。
If you had studied hard before，you would be a college student now. 如果你以前用功学习了的话，你现在就是一名大学生了。 (3)含蓄条件句
用介词(短语)代替条件状语从句，常用的介词(短语)有without，but for，but that，otherwise，or，but等。
Without your help，we could not have succeeded. 没有你的帮助，我们不可能取得成功。
But for electricity，there would be no modern industry. 要是没有电，就没有现代产业。
He felt very tired yesterday，or he would have attended the party. 他昨天太累了，否则他会参加派对的。 (4)if省略句
①当if引导的虚拟条件句中的谓语动词含有had，should，were时，可将if省略，而将had，should，were置于句首，采用倒装结构。
If you had left home earlier，you would have caught the bus.＝Had you left home earlier，you would have caught the bus.
如果你早点从家中出门，你就能赶上汽车了。
②若省略的条件句中的谓语动词是否定形式时，不能用谓语动词的省略形式。
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Were it not for the expense，I would go abroad now. 要不是考虑到花销，我现在可能都出国了。 2．虚拟语气在名词性从句中的应用
(1)demand，suggest，order，insist等表命令、建议、要求后的宾语从句中，谓语动词用“(should＋)动词原形”；wish后的宾语从句中分别用过去式、过去完成式和“could/would＋动词原形”表示与现在、过去和将来情况相反。 We suggested that Tom have a rest. 我们建议汤姆去休息一下。 I wish I were as tall as you. 我希望和你一样高。
He wished he hadn’t said that. 他希望他没讲过那样的话。 I wish it would rain tomorrow. 我希望明天下雨。 (2)
在
It
is
necessary/important/strange
that...
；
It
is
suggested/demanded/ordered/requested that...等从句中，谓语动词用“(should＋)动词原形”。
It is important that we (should) master a foreign language. 掌握一门外语很重要。
It’s suggested that the plan (should) be carried out. 人们建议执行这个计划。
(3)作idea，advice，order，demand，request等表命令、建议、要求的词的表语从句和同位语从句中，其谓语动词用“(should＋)动词原形”。 My demand is that she should come to see me once a week. 我要求她一周来看我一次。
All of us are for the advice that the chemical factory (should) be closed down. 我们都支持关闭化工厂的建议。
3．在as if 从句中，常用虚拟形式，即表示与现在事实相反，用过去式；与过去事实相反用过去完成式 (had done)。
She looks after the boy as if he were her own son. 她照顾这男孩就像对自己的儿子一样。
She talked about the film as if she had really seen it. 她谈论那部影片，就好像她确实看过一样。
4．It’s (high/about) time that＋主语＋过去时/should do，意为“到了某人做……的时
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