新概念青少版3BUnit24Lesson48市公开课一等奖省赛课微课金奖课件

连词成句：inCraigtoday

andIwere

troublewewereonthesystemWhiletostartedentering

dataCraiglaugh1/14theLibrariancameinwerestillbothwelaughingwhenonthedrawinghelostwhilewasworkinghiskey

thekey2/14延续性动词&短暂性动词3/14⑴延续性动词：动词表示行为能够延续一定时间:sleepstaywaitlive⑵短暂性动词：动词所表示行为不能延续，在很短时间内完成。

diecome

leavegotosleepgetmarriedbedead4/14延续性动词与短暂性动词之间转换：

5/14leave————beawayborrow————keepbuy————havedie————bedead6/14finish————beover

join————beinopensth————keepsthopengo(get)out————beout

7/14catchacold——haveacold

comehere——beheregothere——bethere

become——be

8/14comeback——beback

fallasleep——beasleep

leave——beawayputon——wear9/14⑴短暂性动词完成式不能和表示一段时间状语连用Hisgrandfatherhasdiedfortenyears.

（×）Hisgrandfatherdiedtenyearsago.Hisgrandfatherhasbeendeadfortenyears.

1.Howlonghaveyougetmarried？→Howlonghaveyoubeenmarried？2.Mr.Smithhasleftfortwoweeks.→Mr.Smithhasbeenawayfortwo

weeks.（×）（×）10/14时间状语从句when和while：while引导时间状语从句多用进行时态;when引导时间状语从句多用普通时态。

eg.While

they

were

talking

,

the

bell

rang.

eg.I

was

doing

my

homework

when

my

mother

came

back

home

yesterday

evening.

另外，when和while区分还在于：while引导时间状语从句多用进行时态，而when引导时间状语从句多用普通时态。

比如：

1、While

they

were

talking

,

the

bell

rang.

正在他们谈话时候，上课铃响了。

2、I

was

doing

my

homework

when

my

mother

came

back

home

yesterday

evening.

昨天晚上妈妈回家时候，我正在做家庭作

另外，when和while区分还在于：while引导时间状语从句多用进行时态，而when引导时间状语从句多用普通时态。

比如：

1、While

they

were

talking

,

the

bell

rang.

正在他们谈话时候，上课铃响了。

2、I

was

doing

my

homework

when

my

mother

came

back

home

yesterday

evening.

昨天晚上妈妈回家时候，我正在做家庭作

11/14WhileIwaswatchingTV,mysisterwasintheshower.Whenthetelephonerang,mybrotherwasdoinghishomework.12/14while,when使用方法辨析：(1)Whilehewasreading,hefellasleep.(2)Whenhecamein,Iwashavinglunch.WhenIwassleeping,athiefbrokein.13/14用when或者while填空1.Hewasdrivingalong________suddenlyawomanappeared.2._____Jakewaswaitingatthedoor,anoldwomancalledtohim.3.Hewasreadingabook______suddenlythetelephonerang.4.______itbegantorain,they