3.would rather sb.+過(guò)去時(shí),指現(xiàn)在或?qū)?lái)。
例:I’d rather Father were here now.
I’d rather they came here tomorrow.
2.在It is time/high time that sb.should do sth.
或It is time that sb.did sth
1.在主語(yǔ)從句中謂語(yǔ)動(dòng)詞的虛擬語(yǔ)氣結(jié)構(gòu)為:“should+動(dòng)詞原形”表示驚奇,不相信,惋惜等。
例:It is advisable/important/natural/necessary that sb.(should)do
3.When a pencil is put in a glass of water,it looks as if it________.
A.breaks B.has broken C.were broken D.had been broken
命題意圖:此題考查虛擬語(yǔ)氣用于以as if(as though)引導(dǎo)的表語(yǔ)從句或狀語(yǔ)從句。此題屬四星級(jí)題目。
知識(shí)依托:如果從句與現(xiàn)在事實(shí)相反,謂語(yǔ)動(dòng)詞用一般過(guò)去時(shí);表示與過(guò)去事實(shí)相反,謂語(yǔ)動(dòng)詞用“had+過(guò)去分詞”;表示與將來(lái)事實(shí)相反,謂語(yǔ)動(dòng)詞用“would (might,could)+動(dòng)詞原形。”
Li Ming speaks English as if he were an Englishman.(與現(xiàn)在事實(shí)相反)
It looks as if it might rain.(與將來(lái)事實(shí)相反)
It seems as if Tom had travelled a lot in China before.(與過(guò)去事實(shí)相反)
錯(cuò)解分析:本句意思是:當(dāng)把鉛筆放在一杯水里的時(shí)候,它看起來(lái)就跟斷了似的。(其實(shí)沒(méi)斷)與現(xiàn)在事實(shí)相反。故選C項(xiàng)。
解題方法與技巧:看when a pencil is put in…中謂語(yǔ)時(shí)態(tài)。
答案:C
●錦囊妙計(jì)
做好虛擬語(yǔ)氣,除了掌握基本的結(jié)構(gòu)外,還要注意句子所表達(dá)的意義與現(xiàn)在過(guò)去,還是將來(lái)事實(shí)相反,看清時(shí)間狀語(yǔ),另外還要注意在其他結(jié)構(gòu)中虛擬語(yǔ)氣的運(yùn)用。
2.I suggested that the meeting________ till tomorrow morning.
A.should put off B.be put off C.is put off D.will put off
命題意圖:此題旨在考查suggest (建議)后加賓語(yǔ)從句,從句謂語(yǔ)動(dòng)詞的用法。此題屬四星級(jí)題。
知識(shí)依托:suggest/arrange/demand/insist/order/require等動(dòng)詞后的賓語(yǔ)從句中謂語(yǔ)用(should)+動(dòng)詞原形。另外像advise/idea/order/demand/suggestion等詞的表語(yǔ)從句和同位語(yǔ)從句,謂語(yǔ)動(dòng)詞也用(should)+動(dòng)詞原形。
錯(cuò)解分析:A項(xiàng)應(yīng)用should be put off(會(huì)議被延期)。
C、D項(xiàng)都不符合虛擬語(yǔ)氣結(jié)構(gòu)。
答案:B
1.I wish I ________ you yesterday.
A.seen B.did see C.had seen D.were to see
命題意圖:此題旨在考查wish后加賓語(yǔ)從句表示可實(shí)現(xiàn)的愿望。此題屬四星級(jí)題。
知識(shí)依托:wish+賓語(yǔ)從句表示不可實(shí)現(xiàn)的愿望,譯為“……就好了,但愿……”
錯(cuò)解分析:A、B、D項(xiàng)都不是跟過(guò)去事實(shí)相反的虛擬語(yǔ)氣結(jié)構(gòu)。
解題方法與技巧:掌握wish后賓語(yǔ)從句的三種謂語(yǔ)動(dòng)詞結(jié)構(gòu)。
答案:C
3.(★★★★)How I wish every family________ a large house with a beautiful garden. (2002上海春季)
A.has B.had
C.will have D.had had
●案例探究
2.(★★★★)You didn’t let me drive.If we________ in turn,you________ so tired.
A.drove;didn’t get B.drove;wouldn’t get
C.were driving;wouldn’t get D.had driven;wouldn’t have got
1.(★★★★)Jane’s face suggested that she________ ill,and her parents suggested that she________ a medical examination.
A.be;should have B.was;have
C.should be;had D.was;has
34/如圖14所示,電源電壓為9V,標(biāo)有“6 V 6 W”字樣的燈泡正常發(fā)光。求
(1)燈泡的電阻;
(2)電阻兄的阻值大小。
35.湘桂鐵路擴(kuò)能改造工程于2008年12月11日啟動(dòng),設(shè)計(jì)列車(chē)速度達(dá)200 km/h。
(1)若工程竣工后,列車(chē)按設(shè)計(jì)標(biāo)準(zhǔn)運(yùn)行,從柳州到南寧約需1.1 h,則柳州至南寧的鐵路線(xiàn)長(zhǎng)約為多少?
(2)假設(shè)質(zhì)量為4000 t的列車(chē)在平直軌道上勻速運(yùn)行時(shí),受到的阻力為列車(chē)重的
,所有車(chē)輪跟鐵軌接觸的總面積約為0.8 m2。列車(chē)對(duì)鐵軌的壓強(qiáng)為多大?從柳州到南寧,機(jī)車(chē)共做了多少功?(取g=10 N/kg)
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