高中英语 Unit21 Human Biology Section Ⅰ 语法讲座 专题练习课下作业 北师大版选修7

1、【三维设计】2013高中英语 unit21 human biology section 语法讲座 专题练习课下作业 北师大版选修7.用所给词的适当形式填空1if it had_rained (rain) last night, the ground would be wet now.2if she had got financial aid, she would graduate (graduate) from a college this fall.3if we hadnt made adequate preparations, we shouldnt_dare (not dare) to

2、do the experiment next week.4if he had_listened (listen) to me, he would not be in such trouble now.5if you had not studied the problem carefully, you would_find (find) difficulty now.6if i had_studied (study) harder in school, i could qualify for the job now.7if i were_not_to_make (make) a preparat

3、ion for my experiment this afternoon, i would have gone to see the film with you last night.8if we shouldnt have an exam this afternoon, i would_go (go) shopping now.完成句子1他要是多得六票，现在就是我们的主席了。if he would_be six more votes, he had_received our chairman now.2如果玛丽是一位个性强的姑娘，当时她就会拒绝老板了。if mary were a girl

4、of strong character, she would_have_said “no” to her boss.3要不是有医生的照料，我此时就不会在这里和你说话了。if it hadnt_been for the doctors care, i would_not_be_speaking to you now.4如果你登上那航班，你现在就不会在此享受生活了。if you had_gone on board the plane, you would_not_be_enjoying your life here now. 5如果你(那时)听从医生的建议的话，现在就不会有事了。if you ha

5、d_followed the doctors advice, you would_be all right now. .单项填空1_ to do the work, i should do it some other day.aif werebi werecwere i dwas i解析：选c。在虚拟条件状语中有were, should, had这三个词，通常将if省略，主语提前，变成were, should, had主语的形式。但要注意，在虚拟条件状语从句中，省略连词的倒装形式的句首不能用动词的缩略形式。如我们可说were i not to do, 而不能说werent i to do。2_

6、 so busy, she would come to help you.ashould my daughter bwas my daughter notcif my daughter were not dif my daughter isnt解析：选c。考查与现在事实相反的虚拟语气。表示与现在的事实相反的假设，从句用过去时。3shall we take the 10：20 train?no. if we took that train, we _ too late.aarrive barrivedcwill arrive dwould arrive解析：选d。考查与将来情况相反的虚拟语气。句

7、意：“我们坐10：20的火车怎么样？”“不行。如果我们坐10：20的火车，我们会到达的很晚。”主句用“would/could/might动词原形”，故选d项。4how i want to have studied harder when i was in school.if you had, you _ work into late every day nowadays. anyhow, better late than never.adont bwouldntcdidnt dwont解析：选b。考查错综时间条件句的虚拟语气。第一句的信息want to have studied就已表明是表示事

8、与愿违的虚拟语气。第二句的信息词had与nowadays则表明了过去与现在的时间混合。句意：“我在学校读书时，应该更努力点啊。”“要是你努力了，你就不会是现在每天都工作这么晚了。不管怎样，亡羊补牢为时不晚。”使用wouldnt强调与现在事实相反的虚拟语气。5you _ better now if you had listened to me.next time i will.awould be bwill becwould have been dhad been解析：选a。第一句句意：如果你听我的，你现在就会好了。由此可判断这是个混合虚拟条件句，从句与过去相反，主句与现在相反，主句的谓语动词应

9、用would动词原形。6what should we do next!well, if dad _ here, he would know what to do.awere bhad beencbe dis解析：选a。考查虚拟语气。根据语境可知，从句表示与现在事实相反的假设，故选a项。7luckily we had arrived before the rain came.yes, we _ in the rain now if we _ earlier.awould walk; hadnt started outbwould have walked; havent started outcw

10、ould be walking; hadnt started outdare walking; didnt start out解析：选c。由题意知，条件句是与过去事实相反；由now 可知主句是与现在事实相反，所以选c。8it is hard for me to imagine what i would be doing today if i _ in love, at the age of seven, with the melinda cox library in my hometown.awouldnt have fallen bhad not fallencshould fall dwe

11、re to fall解析：选b。句意：如果我没有在7岁时就迷恋上了我们家乡的melinda cox图书馆，我真不能想象我今天会在做什么。根据句意和i would be doing可以判断此处为虚拟语气。at the age of seven是表示过去的时间状语，因此if从句中谓语动词要用had not fallen, 表示对过去情况的假设。9if we had not missed the bus, we _ lunch at home now.awould have had bwould havecmust be having dwould be having解析：选d。句意：要是我们没有错过公交车的话，我们现在就会正在家里吃午饭了。条件句表示与过去事实相反的情况，用过去完成时；主句表示与现在事实相反的情况，且此处强调正在进行的动作，所以用would be doing。10if we had taken such effective measures much earlier, the river _ so seriousl