(共31张PPT)
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课标考点
1.掌握动词的第三人称单数形式、过去式、过去分词和现在分词的构成。
2.掌握动词的8种时态的基本结构及区别。
3.了解过去将来时、过去完成时的基本用法。
考点一:动词的时态
初中阶段应掌握的时态共有八种,即一般现在时、一般过去时、一般将来时、现在进行时、过去进行时、过去将来时、现在完成时和过去完成时。
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肯定句 疑问句 否定句
I work. Do I work? I do not work.
He(She,It)works. Does he (she,it)work? He(She,It)does not work.
We(You,They)work. Do we(you,they)work? We(You,They)do not work.
1.一般现在时
(1)结构:(以work为例)
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(2)用法:
①表示事实、现状、性质或经常的、习惯性的动作。常与often,usually,always,sometimes,today,every day,once a week,every five minutes,on Sundays等时间状语连用。如:
I go to school at seven every day.
我每天七点去上学。
②表示普遍真理。如:
The earth _____________ the sun.
地球绕着太阳转。
③表示在现在时间里所发生的一个动作。如:
Here comes the bus.
公共汽车来了。
goes around
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④在时间和条件状语从句中代表一般将来时。如:
I'll go shopping with my mother if she ________ tomorrow.
如果明天我妈妈有空,我将和她去购物。
①直接加s。如:work—works。
②辅音字母+y结尾的词,先变y为i,再加es。如:carry—carries;cry—cries;try—tries;study—studies。
③以s、x、o、ch、sh结尾的加es。如:wash—washes;teach—teaches;go—goes;pass—passes;fix—fixes。
④特殊:have—has。
(3)单数第三人称形式变化规则如下:
is free
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2.现在进行时
(1)结构:am/is/are+动词的 ing形式
(2)用法:
①表示目前发生(进行)的动作(不指状态),常用的时间状语有: now,at the moment 等,并常出现在祈使句的句子中,与 look,listen连用。如:
Are you writing a letter to your friend now
你现在正在给你朋友写信吗?
Listen! She __________ in the next room.
听!她正在隔壁唱歌。
is singing
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②表示目前阶段正在进行,而此刻不一定在进行的动作。如:
We ____________ trees these days.
这些日子我们正在植树。
③表示位置移动的动词的进行时表示动作将要发生。come,go,leave,arrive,fly等,并常与表示将来的时间状语连用。如:
They ________________England tomorrow afternoon.
他们明天下午要去英国。
are planting
are leaving for
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①一般加ing。如:play—playing。
②以不发音字母e结尾的,去e加ing。如:come—coming; make—making; live—living;
write—writing; take—taking。
③元音+辅音结尾的,且是重读闭音节的单词,双写辅音字母,再加ing。如:run—running;sit—sitting;begin—beginning;cut—cutting;stop—stopping;get—getting;swim—swimming;plan—planning。
④特殊:die—dying;lie—lying;tie—tying。
(3)现在分词的变化规则:
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3.一般将来时
(1)结构:助动词shall/will+动词原形
(2)用法:
①表示将要发生的动作或状态,常用的时间状语有: later(on),soon,in a month,next time,from now on,tomorrow等。如:
I shall be eighteen years old next year.
明年我18岁了。
②表示某种必然的趋势。如:
Fish ________ without water. 离开水,鱼就会死。
will die
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(3)注意:
① 在以第一人称为主语的问句中,常用 shall 表示提议和询问情况,在以第二人称作主语的句中,用will 表示请求。如:
Where shall we have lunch 我们在哪里吃午饭?
②当主语是第一人称时,用will 表示意愿、决心、允诺、命令等。如:
I will give Xiaoming a good gift for his birthday.
我答应小明在他生日时送一份好礼。
③在时间或条件状语从句中,一般用一般现在时代替一般将来时。如:
I ____________ Jim when he ______ there.
当吉姆到达那里时,我将给他写信。
will write to
gets
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④“be going to+动词原形” 也可表示将来时。
a.表示主观意愿、打算等。如:
He's going to learn English next term.
下学期他打算学英语。
b.根据已有迹象,可能要发生的情况。如:
Look at the black clouds!It __________ rain.
看那些乌云!马上要下雨了。
[提示] 非延续性动词的进行时常表达将来之意,如:come,go,leave,start,finish等。
She's leaving for England next month.
下个月她将去英国。
is going to
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4.一般过去时
表示过去发生的动作或存在的状态。句中的动词要变为过去式。
(1)句型结构:
①be动词型
I was a student last year. 去年我是名学生。
—Were you at home this morning
今天早上你在家吗?
—Yes,I was./No,I wasn't.
是的,我在。/不,我不在。
②行为动词型
Tom ______ to Shanghai last year.
去年汤姆去了上海。
John __________ here last year.
去年约翰没有住在这里。
Did you see him just now 你刚才看见他了吗?
went
didn't live
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(2)用法:
①主要用于过去的某个时间发生的动作或存在的状态。
His friend was at work yesterday.
他的朋友昨天在工作。
②表示过去经常或反复发生的动作,常与often,always 等表示频度的时间状语连用。
We often went to work by bus last year.
去年我们经常乘公交车上班。
③和when 等引导的时间状语从句连用。
When he got home,he ______ a rest.
当他到家时,他休息了一会儿。
had
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④常与表示过去的时间状语连用。
ago,yesterday,last week,in the old days,when I was five years old,in 1995等。
We began our work ______________.
三小时前,我们开始工作。
three hours ago
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①一般情况在动词原形后加ed。如:
watch—watched。
②以不发音字母e结尾的加d。如:
live—lived;practice—practiced。
③以辅音字母加y结尾的,变y为i加ed。如:
study—studied;carry—carried;cry—cried。
④以重读闭音节结尾,末尾只有一个辅音字母的,先双写该辅音字母,再加ed。如:
stop—stopped;plan—planned;prefer—preferred。
⑤不规则动词的过去式需特殊记忆
(3)动词过去式的变化规则:
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5.现在完成时
(1)结构:have/has+动词的过去分词
(过去分词变化规则基本与过去式变化相同。有些特殊变化需单独记忆)
(2)用法:
①表示过去发生的动作对现在造成的影响和结果。有时与just,already,yet,recently,before,twice,three times等时间状语连用。如:
I __________ the film already.
我已经看过那部电影了。(现在我知道电影的内容了。)
have seen
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②表示从过去某一时刻开始一直持续到现在的动作或状态。常与“since+时间点”,“for+时间段”,及how long,(ever)since,ever,before,so far,in the last/past few years,up to now,till now等时间状语连用。如:
We've planted thousands of trees in the past few years. 过去几年我们种了成千上万棵树。
So far there __________ no bad news.
到现在为止还没有什么坏消息。
has been
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(3)一般过去时与现在完成时的区别
一般过去时只强调在过去发生过某事或关注的是动作发生的时间、地点、方式等。而现在完成时则强调过去的动作对现在的影响,因此,若现在影响并不存在时就不能用现在完成时了。如:
I saw the movie yesterday.
我昨天看了这部电影。(强调电影是昨天看的)
I have already seen the film.
我已经看过这部电影了。(强调到现在为止看过这部电影了)
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(4)延续性动词
在现在完成时中,如果有持续的时间,要把非延续性动词变为延续性动词。如:
I have had the book for two days.
这本书我已经买了两天了。(用had,而不用bought)
I have been in Tokyo for two weeks.
我已经来东京两周了。(用been in,而不用come to)
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常用瞬间动词变延续性动词表
①have arrived at/in sp, got to/reached sp, come/gone/moved to sp→have been in sp
②have come/gone back,returned→have been back
③have come/gone out→have been out
④have become→have been
⑤have closed/opened→have been closed/open
⑥have got up→have been up
⑦have died→______________
⑧have left sp→_____________________
⑨have fallen asleep/gone to sleep→have been asleep
have been dead
have been away from sp
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⑩have finished/ended/completed→________________
have married→have been married
have started/begun to do sth→have done sth
have begun→______________
have borrowed/bought→______________
have lost→haven't had
have put on→have worn
have caught/got a cold→have had a cold
have got to know→have known
have been over
have been on
have kept/had
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have gone to→have been in
have joined/taken part in the league/the Party/the army→have been a member of/have been in the league/the Party/the army,have been the Party's member/the league member/the soldier
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6.过去进行时
(1)结构:was/were+doing
(2)用法:
过去进行时主要表示过去某一时间或某一段时间正在进行的动作。如:
His father fell while he __________ his bicycle and hurt himself.
他爸爸骑自行车时摔了下来,并弄伤了自己。
(3)常用的时间状语:this morning,the whole morning,all day yesterday,from nine to ten,last evening,when,while。
was riding
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(4)when和while的区别:
①引导时间状语从句时,while 连接的是时间段,而when连接的多是时间点。如:
What was your father doing ______ your mother was cooking?你妈妈正在做饭时,你爸爸干什么呢?
What did your mother do ______ you came back
当你回来时,你妈妈干什么呢?
②while可以连接两个并列的句子,而when不可以。如:
I was trying my best to finish my work while my sister was watching TV.
我当时正在尽力完成作业,而我的妹妹正在看电视。
③when是特殊疑问词,对时间进行提问,while 不是。如:
When were you born
你是什么时候出生的?
while
when
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7.过去完成时
(1)结构:had+动词的过去分词
(2)用法:
①表示过去的某一时刻以前已经发生的动作或存在的状态,也就是“过去的过去”。常以by,before短语或when,before,after,until等引导的从句作为前提。如:
My teacher said she had never been to London.
我老师说过她从来没去过伦敦。
When the police arrived,the thieves ________________.
警察到达时,小偷们早就跑了。
had run away
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②表示从过去某一时刻开始一直延续到另一过去时刻的动作或状态。跟现在完成时一样,也常与 how long,for three days,before 等表示一段时间的状语连用。如:
When Jack arrived,he learned Mary ______________for almost an hour. 当杰克到来时,他才了解到玛丽已经离开差不多一个小时了。
had been away
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8.过去将来时
(1)结构: would+动词原形或者was/were+going to+动词原形。
(2)用法:
表示从过去的某一时刻看,将要发生的动作。如:
His uncle said that _____________ a good harvest the next year.他叔叔说明年会有个好收成。
[提醒] 在由if引导的条件状语从句中,如果主句中用过去将来时态,if从句中需用一般过去时代替过去将来时。
Amy said that she would go shopping if it didn't rain the next day.
艾米说如果明天不下雨,她就去购物。
there would be
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考点二:动词的被动语态
英语动词有两种语态:主动语态和被动语态。
1.被动语态的构成: 主语+be+动词的过去分词
(1)一般现在时:主语+am/is/are+动词的过去分词
(2)一般过去时:主语+was/were+动词的过去分词
(3)一般将来时:主语+will/shall/be going to+be+动词的过去分词。如:
A bridge will be built over the river.
(4)现在进行时:主语+am/is/are+being+动词的过去分词。如:A bridge is being built over the river.
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(5)现在完成时:主语+have/has+been+动词的过去分词
(6)过去进行时:主语+was/were+being+动词的过去分词
(7)过去完成时:主语+had been+动词的过去分词
(8)过去将来时:主语+would be+动词的过去分词
(9)含有情态动词的被动语态:主语+情态动词+be+动词的过去分词。如:A bridge can be seen over the river.
(10)在使役动词have,make,get,let以及感官动词see,find,watch,notice,hear,feel等后面不定式作宾语补足语时,在主动结构中不定式to要省略,但变为被动结构时,要加to。如:Someone saw a stranger walk into the building.
改为:A stranger was seen_________ into the building.
to walk
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2.谓语动词的主动形式表示被动意义
(1)英语中有很多动词,如: break,catch,clean,drive,lock,open,sell,read,write,wash等,当它们被用作不及物动词来描述主语特征时,常用其主动形式表达被动意义,主语通常是物。
This kind of cloth ________________.这种布料很好洗。
[注意] 主动语态表被动强调的是主语的特征,而被动语态则强调外界作用造成的影响。
试比较:The door won't lock.(指门本身有毛病)
The door won't be locked.(指不会有人来锁门,表示“门没有锁”是人的原因)
washes well
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(2)表示“发生、进行”的不及物动词和短语,如:happen,last,take place,break out,come out,come about,come true,run out,give out,turn out等以主动形式表示被动意义。
How do the newspapers come out
这些报纸是如何印刷出来的呢?
(3)系动词没有被动形式,但有些表示感受、感官的连系动词。如:feel,sound,taste,feel等在主系表结构中常以主动形式表示被动意义。
Your reason sounds reasonable.
你的理由听起来很合理。