a基础知识归纳重点短语。
跑掉了21在车站外面22在车站四周走动23考虑对、、、说25找车（小汽车日常活动37默默地一起走回家38发生39在纽约的世贸中心40对、、、来说有着很深的意义41和、、、一样一位民族英雄43全世界。
b语法知识讲解。
1 when和while的用法区别（一）、when，while都有“当时候”的意思。when既可表示某一点时间，也可以表示某一段时间。在when引导的时间状语从句中，其谓语动词可以是延续性的，也可以是非延续性的，可与主句中的谓语动词同时发生，也可在其后发生。
例如：i was just reading a book when she came into my room.她走进我房间时，我正在看书。were you writing when the teacher came in?
老师进来的时候，你在写信吗？
when he was a child he was always trying out new ideas.他小时候就常常试验一些新的设想。（二）、while只能表示某一段时间，不能表示某一点时间。
在while引导的时间状语从句中，其谓语动词只能是延续性的，而且也只能与主句中的谓语动词同时发生或存在。例如：
while jim was mending his bike, lin tao came to see him.正当吉姆修自行车时，林涛来看他。
you can’t do your homework while you’re watching tv.你不能一边看电视一边做家庭作业。(三）、另外，when和while的区别还在于：
while引导的时间状语从句多用进行时态，而when引导的时间状语从句多用一般时态。例如：while they were talking , the bell rang.
正在他们谈话的时候，上课铃响了。
i was doing my homework when my mother came back home yesterday evening.昨天晚上妈妈回家的时候，我正在做家庭作注意：1)如主句谓语动词表示的是短暂动作，从句时间状语指一段时间，whenwhile as三者可通用。
例如：peter came in while /as i was watching tv.当peter进来的时候我正在看电视。i was watching tv when peter came in.
当peter进来时我正在看电视。
2) as和when可与非延续性动词连用，而while只能与延续性动词连用。例如：he came in when/ as i was going to bed.
我正要**睡觉，他进来了。
3) as和while可用来指一段时间，但as强调主句与从句表示的动作同时发生，while强调主句表示的动作是在while从句的动作延续中发生。例如：
as my mother sang those old songs, tears ran down her cheeks.当我妈妈唱起那些老歌时，眼泪顺着她的脸颊流了下来。2 think about
think about is thinking about that event.
think about about doing father is thinking about going on vacation.3 see sth看见某人干某事。
see sb. doing sth.看见某人正在干某事4it be difficult for sb.
to do sth.干、、、对某人来说是困难的it is difficult for me to work it out.
c达标检测题。
. fill in the blank with the right verb form.(用所给动词的正确形式填空。
)1. there __be) a football match on tv yesterday evening. but i __h**e)no time to watch it.
2. did sheh**e) supper at home?
3. how many peoplebe) there in your class last term?
4. she watches tv every evening. but she __not watch) tv last night.
5. therebe) a telephone call for you just now.
参***： down the right word form requested in the brackets.（根据括号内的要求，写出单词的正确形式。）
过去式反义词形容词名词过去式过去式过去式过去式。
答案： in the blank with the proper preposition or adverb in the box.(用方框里恰当的介词或副词填空。
)a. asb. offc.
ind. awaye. out1.
mark is as tallhis uncle.
outside, comeplease.
3. the thiefdidn’trunbecause the police caught them.4.
when he arrived the airport, the plane had taken
. fil2
5. my brother gotyou can call him when he comes back.参***：
.choose the right phrase to complete the sentence.(选用正确的短语完成句子。
)a. in the barber shopb. in the kitchenc.
in the libraryd. at the gyme. at school
1. when i called mrs. green, she was ****** pizza2we can study all kinds of subjects.
3. they often exercise
4. mike was readingwhen i went past.
5. mr. white was cutting hairwhen the ufo arrived.参***：
.fill in the blank with the right word form.(用所给动词的正确形式填空。
)1. iget) ready for supper at five last sunday.2.
the storyhappen) in june, 1919.
3theyshop) when you met them?
4. the train usuallyle**e) the station at teno’clockin the morning.5.
stopread) andlisten) to me carefully.
6. we think the boybe) a good singer in the future.
参***：1.答案：
was gettingat five last sunday是过去进行时的时间状语。2.答案：
happenedin june,1919用过去时；happen不用被动语态。
3.答案：were; shopping本句意为“当你碰到他们的时候，他们正在购物吗？”4.答案：le**esusually是一般现在时的时间状语。
5.答案：reading; listenstop doing sth.
意为“停止做某事”。并列连词and连接两个并列的动词，前面是动词原形stop,所以第二个空也应用动词原形。6.
答案：will bein the future是一般将来时的时间状语。ⅵ.
draw lines to match the dialogue.(把下列对话用线连起来。)
1. what was jimmy doing when the ufo arrived?a. well, next, they played
with the children.
2. when did it happen?b.
they visit every summer.3. what happened after that?
c. no, they thought it was funny.4.
were the girls scared?d. last night.
5. how often do the aliens come?e. he was playing chess with his brother.参***：
.fill in the blank with the right phrase form.(用所给词组的正确形式填空。
)call the policerun awayjump downclimb the treeget out
1. while the girl was shopping, the alien2. look!
that boyit’sdangerous.3. when he saw the alien, he
4. the catfrom the tree when i went to it.5. when the thief saw the police, he
参***： climbing the the jumping away
.translate the chinese in the brackets into english.(把括号中的中文译成英语。
) my father called me, i was理发).
kind manthe报警) when he saw the 大约十点左右) in the evening the ufo arrived atthe bank of the river.
were惊讶) the change in his appearance.
cat跳下) the tree when it saw a boy throw at it.
答案 at/surprised at5. jumped off
.multiple choice(单项选择)
1. my motherin the kitchen when the phone rang.
a. isb. is cookingc.
was cookingd. cooked答案：c当rang的动作发生的时候，cook的动作正在进行。
2. when i came into the bank, the clerkthe talked withb. talked onc.
was talking ond. was talking in
答案：ccame这个动作发生的时候，talk的动作正在进行。 her. shepiano.
a. was practisingb. is practising thec. was practising thed. is practicing
答案：b本题指的是说话时正在发生动作，所以应用现在进行时，乐器前面要加定冠词the。
4. i brush my teeth before ithe dentist.
a. went tob. goc.
go tod. went答案c主句是一般现在时，并且动作发生在go之前，所以后者只能用一般现在时。5we were eating dinner in the restaurant, theowner’sdog took my bag away quietly.
a. becauseb. whilec. as soon asd. until
答案：b本题主要考查while引导时间状语从句的用法。它引导的从句的谓语动词常是持续性动词，用过去进行时，主句用一般过去时。
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