【语法】when引导的时间状语从句

When引导的时间状语从句Lead-inWhenIwaseight,Igotabookaboutstars.Lead-inWhen

theteachercamein,thestudentsbecamequiet.Lead-inWhen

wearewatchingTV,mumiscooking.Lead-inWhen

thetelephonerang,mybrotherwasreadingabook.Lead-inWhen

Igottotheairport，theplanehadleft．Presentation1．从句动作在主句动作之前发生。

When

he

had

finished

his

homework，he

took

a

short

rest．（finished先发生）I.

when时间状语从句的谓语动词所表示的动作可以在主句谓语动作之前、之后或同时发生Presentation2．从句动作在主句动作之后发生。

When

I

got

to

the

airport，the

guests

had

left．（got

to后发生）Presentation3．从句动作和主句动作同时发生

Whenweweredancing，astrangercamein．Whenshewasmakingaphonecall，Iwaswritingaletter．Presentation①YoushallborrowthebookwhenIhavefinishedreadingit．②Whenthemanagercomeshereforavisitnextweek,I'lltalkwithhimaboutthis．

II

.在将来时从句中，常用when，且从句须用一般时态替将来时Presentation

III.

when时间状语从句可以位于主句前，也可以位于主句后。我们可以说：Whenwearrived,theskywentdark．

也可以说：Theskywentdarkwhenwearrived.

PresentationIV.

when引导时间状语从句时,表示“当……的时候”,从句的谓语动词可以是延续性的,也可以是非延续性的.它引导的时间状语从句通常用一般现在时表示一般将来时。Iwillgotoseeyouwhenyoufinishthetrainingcourse.PresentationV.when作并列连词用时,表示"在那时；这时突然",相当于andthen或atthattime。Hewasabouttotellmethesecretwhensomeonepattedhimontheshoulder.PracticeWhenJohn________(arrive),I___________(cook)dinner.2.Whenshe________(come)intomyroom,I__________(read)abook.用所给动词正确时态填空完成句子。课堂练习arrivedwascookingcamewasreadingPractice3.Whenwe____________(watch)TV,thetelephone__________(ring).4.Whenwe___________(dance),astranger__________(come)in.werewatchingrangweredancingcamePractice直击中考1.【2014.威海】--Alan!Whyareyousolate?--Sorry!WhenI_____home,Imetoneofmyoldfriends.A

went

Bamwalking

C

hasgone

Dwaswalking

Practice【解析】考查when时间状语从句时态。句意“当我正往家走的时候，我遇见我的一个老朋友”。只有waswaling适合此意，故选。DPractice2.【2015.广东】--Sir,Jennywantstoknowwhenshecanleavetheoffice.--Onlywhenshe____copyingthisreport.AfinishesBfinishCfinishedDwillfinishPractice【解析】考查when时间状语从句的时态。句意：--先生，珍妮想知道她能什么时间离开办公室。--只有当她抄完这份报告的时候才能离开。when引导时间状语从句时，如果主从句动作都没有发生，主句动作用将来时，从句用一般现在时。即“主将从现”，故选。APractice3.【2015.广东梅州】I

was

very

exciting

____

I

heard

the

news

that

the

highspeed

rail

would

be

built

from

Guangzhou

to

Xiamen.

A

after

Bwhen

C

untilDwhilePractice【解析】此题考查引导时间状语从句的从属连词辨析，选项词意A.after“在...之后B.when“当...时”C.until“直到......”D.while“当...时”根据语境且从句谓语动词为heard属结束性动词，所以不能选while，答案选B.Practice10.【2015.天津】______

the

dinner

was

all

over,

everyone

helped

wash

the

dishes.

A

HowBWhen

CBefore

D

Why

Practice【解析】此题考查引导时间状语从句的从属连词when用法句意“晚饭结束的时候，大家都帮忙洗碗”,选项里面只有when意思适合，故选

。BHomeworkAShealwaysbringsapresentHesitsonthefloorHestayedinbedShetakesabasketBahewasillbshegoesshoppingcshevisitsherfriendsdshewatchesTVMatchtheclausesincolumnAwiththoseincolumnBtomakecompletesentenceswithwhen.Thenrewriteeachsentencewiththeadverbialclauseatthebeginning.HomeworkKey1.Shealwaysbringsapresentwhenshevisitsherfriends.When

shevisitsherfriends,shealwaysbringsapresent.HomeworkKey2.Hesitsonthefloorwhen

shewatchesTV.

When

shewatchesTV,hesitsonthef