when-before-since-句型辨析(原创)

when,before,since句型归纳1、when句型：

(1)bedoingsth…when…

Hewasstillsmilingwhenthedooropenedandhiswifecamein.

他正笑着的时候门突然开了，他妻子走了进来。

(2)beabouttodosth…when…

Wewereabouttostartwhenitbegantorain.

我们刚要出发，天就开始下雨了。

(3)beonthepointofdoing…when正要…这时…Wewereontheponitofgivingupwhenatruckcameintooursight.我们正要放弃，这时看到了一辆卡车。

(4)hadnot/hardly/sceracely…when…

(一…就…)Hehadnot/hardly/scarcelyfallenasleepwhenthetelephonerang.

他刚要入睡就响了。(5)hadjustdone…when…(刚做完…某事发生)

Ihadjustgonetobedafteraveryharddaywhenthephonerang.

在劳累了一天之后我刚刚就寝，铃就响了。(6)还可以表示原因“既然”，相当于since;consideringthat.

Itwasfoolishofyoutotakeataxiwhenyoucouldeasilywalkthereinfiveminutes.

beforesbcan/could…某人还没来得及……

BeforeIcouldgetinaword，hehadmeasuredme．

我还没来得及插话，他就给我量好了尺寸Itwillbe/was+时间+before过一段时间才……

Itwillbe4yearsbeforehegraduates.他还有四年时间毕业了。Itwon’tbe/wasn’tlong……before….beforelong(adv.)Itwas5minutesbeforeheleft.Itis/hasbeen5minutessinceheleft.

2.before句型(3)haddone…before

〔才……〕

Wehadsailedfourdaysandfournightsbeforewesawland.

我们航行了四天四夜才见到陆地。

(4)

hadnotdone---before---

不到……就……

Wehadn’trunamilebeforehefelttired.

我们还没走到一英里路他就觉得累了。

Itis/hasbeen＋段时间＋sincesb.did…Itisthreeyearssinceshewasinourclass.

她离开我们班有三年了。

Itisthreeyearssincehelivedhere.

Itis3yearssinceImovedhere自从他不住这儿已经三年了。自从我搬到这儿已经三年了。

3.since句型1.(04北京春)Wewereswimminginthelake______suddenlythestormstarted.A.when B.while C.until D.before2.(02上海)Hewasabouttotellmethesecret______someonepattedhimontheshoulder.A.as B.until C.while D.when3.(05上海)Hetransplantedthelittletreetothegarden______itwasthebesttimeforit.A.where B.whenC.that D.until4.(05福建)－DidJackcomebackearlylastnight?－Yes.Itwasnotyeteighto’clock______hearrivedhome.A.BeforeB.whenC.that D.until5.(06辽宁)Hewasabouthalfwaythroughhismeal______afamiliarvoicecametohisears.A.why B.where C.whenD.whileExercises:A.whenD.whenB.whenB.whenC.when6.(06天津)ThecostoflivinginGlasgowisamongthelowestinBritain,______thequalityoflifeisprobablyoneofthehighest.A.since B.whenC.as D.while7.(04年江苏)______Iacceptthatheisnotperfect,Idoactuallyliketheperson.A.While B.SinceC.BeforeD.UnlessD.A.8.______enteredtheofficewhenherealizedthathehadforgottenhisreport.A.Hehardlyhad B.Hadhehardly C.Hardlyhadhe D.HardlyhehadC9.(03年北京)Hemadeamistake,butthenhecorrectedthesituation______itgotworse.A.until B.when C.before D.as10.(04福建)Scientistssayitmaybefiveorsixyears______itispossibletotestthismedicineonhumanpatients.A.since B.after C.before D.when11.(06四川)－Whydidn’tyoutellhimaboutthemeeting?－Herushedoutoftheroom______Icouldsayaword.