（浙江专用）2021-2022年新教材高中英语 Unit 4 Journey Across a Vast Land Period 3 Learning About Language 语法精析课课件 新人教版选择性必修2.ppt

1、Unit 4Journey Across a Vast LandPeriod 3Learning About Language语法精析课语法精讲透析现在分词和过去分词【体验悟】阅读下面的课文原句,体会黑色字体的单词在句中的作用。The next day was clear and mild,and they were pleased to see the beautiful mountains looking out over the city.Seen from the train window,the mountains and forests of Canada looked massi

2、ve.The next morning,the two girls arose early to take the train to Lake Louise,passing through the Canadian Rockies.Looking at the beautiful scenery,they both agreed that it was the most awesome journey they had ever taken.There was frost on the ground,confirming that autumn had arrived in Canada.【生

3、成得】1.现在分词具有双重性,一面具有动词的特征,可以有自己的_和_;另一面具有形容词和副词的特征,可以充当_,_,_,_,可以表示主动或正在进行的动作,是非谓语动词的一种。2.过去分词在句中可以作定语、状语或宾语补足语,表示它与所修饰的词之间的被动关系。宾语状语表语 定语 状语 补足语【研学析】一、现在分词的时态过去分词没有时态形式的变化,所以这里只讲现在分词的时态形式。1.现在分词的时态形式一般式:doing 完成式:having done 2.现在分词一般式其所表示的动作与谓语动词所表示的动作同时发生。如:Working together with Dr.Bethune,we learn

4、ed a lot from him.在和白求恩大夫一起工作时,我们从他身上学到了很多东西。(working与learned同时发生)3.现在分词完成式其所表示的动作发生在谓语动词所表示的动作之前,常常用作状语,表示时间或原因。如:Having done his homework,the schoolboy began to write his diary.这个男学生做完作业后,开始写日记。(having done his homework发生在began之前,表示时间。)4.现在分词的被动语态一般式:being done完成式:having been done如:Being surrounde

5、d,the enemy troops were forced to surrender.敌军被包围了,被迫投降。Having been asked to stay,I couldnt very well leave.人家请我留下,我就不好离开了。【内化用】语法填空。_(know)that they were going abroad next week,they began to make preparations.Not _(do)it right,I tried again.He came up to me,_(say)“Glad to see you again.”This is one

6、 of the many dams _(build)along the river.Knowinghaving donesayingbeing built二、含有分词的复合宾语 分词可作复合宾语中的宾语补足语。可有这种复合宾语的动词有see,watch,hear,set,keep,find,have,get等等。如:We saw them walking across the road.我们看见他们穿过那条马路。【语境辨析】1.在have或get后面的复合宾语中,宾语补足语多是过去分词,而它所表示的动作又往往由别人完成。如:We must get the television set repa

7、ired.我们必须把电视机修好。(请别人修)2.但have的复合宾语中的过去分词的动作有时不一定由别人来完成。如:He had his arm broken.他把手臂折断了。(不是别人给弄折的,而是自己弄折的)【点拨迷津】1.上述句子结构变为被动语态时,除主语和宾语互换位置外,分词不动。如上面的例句可变为:They were seen walking across the road.2.现在分词在复合宾语中和动词原形在复合宾语中的意义稍有不同。后者指事情的全过程,目的在于仅仅说明发生了这件事;前者指正在继续的动作的一部分,目的在于将该动作当时进行的情景呈现于读者之前,其含义相当于进行时态。如:

8、I saw him go upstairs.我看见他上楼去了。(看见他上楼的整个过程,只说明他上楼这件事)I saw him going upstairs.我看见他走上楼的。(只看见他上楼这个动作的一部分,说明他上楼的情景)I was working in the room all morning,I heard somebody knock at the next door.我整个上午在房间工作,听见有人敲隔壁房间的门。(听见敲门整个过程)When I went back to the room,I heard her practicing singing in the next room.

9、我回房间时听见她在隔壁房间练歌。(只听见一部分,也许回房间前她已开始唱了)【内化用】语法填空。I found my hometown almost completely _(rebuild).I had my watch _(mend)in town.If we have shortcomings,we are not afraid to have them _(point)out and criticized.We heard the children _(sing)“I Love Beijings Tian anmen”.rebuiltmendedpointedsinging三、现在分词和

10、过去分词主要的区别表现在语态和时间关系上1.语态上不同:现在分词表示主动的意思,而过去分词多由及物动词变来,表示被动的意思。试比较:surprising 使人感到惊讶的(主动)surprised 自己感到惊讶的(被动,即被惊讶的)an exciting story 一个令人兴奋的故事(主动)excited spectators 激动的观众(被动,即被引起激动的)A tiring journey 累人的旅行A tired football player 累了的足球运动员He told us many interesting things last night.他昨夜告诉我们许多有趣的事情。She

11、 is interested in astronomy.她对天文学有兴趣。也有一些过去分词是由不及物动词变来的,它们只表示一个动作已完成,没有被动的意味。如:the risen sun 升起的太阳fallen leaves 落叶the exploded bomb 已爆炸了的炸弹a retired miner 一个退休矿工2.时间关系上不同:一般说来,现在分词所表示的动作往往正在进行,而过去分词所表示的动作,往往已经完成。试比较:the changing world 正在变化着的世界the changed world 已经变化了的世界boiling water 正在开的水boiled water

12、 已经煮开过的水(可能是凉开水)developing countries 发展中国家【内化用】根据汉语提示用括号中词的适当形式填空。a _(move)film 一部感人的影片a _(move)audience 一位受感动的观众_(return)students 归国留学生_(develop)countries 发达国家movingmovedreturneddeveloped四、分词和分词短语的作用1.作定语作定语用的分词如果是单词,一般放在它所修饰的名词之前。如:Im reading a very interesting book.我在读一本很有趣的书。He likes to drink co

13、ld boiled water.他喜欢喝凉开水。分词短语作定语用时,一般放在它所修饰的名词的后面。它的功用相当于定语从句。如:After getting all the work done,we put up a board reminding people to protect the trees.(=which/that reminded people to protect the trees)做完所有的工作后,我们竖起了布告牌提醒人们保护这些树木。The man sitting in the corner is my brother.(=who is sitting in the cor

14、ner)坐在角落里的那个人是我的弟弟。2.作表语The opera is very moving and instructive.这个歌剧很动人,且有教育意义。The cups are broken.这些杯子是破的。【点拨迷津】分词作表语用时,相当于形容词,不可与进行时态和被动语态中的分词混淆。它们的形式相似,但可以从意义上加以辨别。试比较:Lei Fengs spirit is inspiring the people all over the country.雷锋的精神鼓舞着全国人民。(现在进行时)His report is inspiring.他的报告鼓舞人心。(现在分词作表语)The

15、road was completed by the PLA men.这条路是中国人民解放军战士修成的。(被动语态)The road is completed.这条路已经修成。(过去分词作表语)3.作状语:分词在意义上也可用作状语,表示时间、原因、方式和伴随情况等。(1)表示时间(在意义上往往相当于表示时间的状语从句)。如:Looking out of the window,I saw groups of children passing by the house.我从窗口望出去,看见成群的孩子们从房子前面走过。(=When I looked out of the window)Heated,t

16、he metal expands.这种金属加热后会膨胀。(=When it is heated)Opening the drawer he took out a dictionary.他打开抽屉,拿出一本词典。(=He opened the drawer and took.这两个动作是一个接着一个)【点拨迷津】如果要强调分词短语与谓语动词所表示的时间关系,分词短语之前可用when或while等连词。如:While working in the factory(=While I was working in the factory),I learnt a lot from the workers

17、.我在工厂工作期间,从工人那里学到了很多东西。(2)表示原因(在意义上相当于表示原因的状语从句)。如:Feeling tired,I telephoned and said I couldnt come to a hospital of Chinese medicine.我感到累,打电话说我不能去中医医院了。(=Since I felt tired)Thinking that Chinese medicine might help,he went to a hospital of Chinese medicine.他想中医也许有效,于是到一家中医医院去治病。(=As he thought th

18、at.)(3)表示方式、伴随情况及结果(这种用法没有相当的状语从句可以代替)。如:He came running back to tell us the news.他跑着回来告诉我们这个消息。(方式)She stood there waiting for the bus.她站在那儿等公共汽车。(伴随情况)The child fell,striking head against the door and cutting it.小孩摔了一跤,头在门上碰破了。(结果)He went out slamming the door.他走出去砰地一声把门关上了。(伴随情况)The lichens came

19、borne by storms.这些地衣是由暴风雨带来的。(方式)【内化用】用括号中单词的适当形式填空。Most of the people _(invite)to the party did not come.He was _(marry)when he was twenty five years old._(inspire)by the excellent situation they worked even harder.invitedmarriedInspired五、独立主格结构(absolute construction)1.定义独立主格,首先它是一个“格”,而不是一个“句子”,在英

20、语中任何一个句子都要有主谓结构,而在这个结构中,没有真正的主语和谓语动词,但又在逻辑上构成主谓或主表关系。独立主格结构不是主谓完整的简单句,而只是一个短语。其公式为:名词/名词短语/代词+不定式/-ing分词/-ed分词/形容词/副词/介词短语。名词前也可以加with。2.功能“独立主格结构”在句中的功能就相当于一个带有自己主语的状语从句。众所周知非限制性从句通常以主句的某一成分作为自己的逻辑主语,从而依附于主句。而有些非限制性从句和无动词从句带有自己的主语,在结构上与主句不发生关系,因此成为独立主格结构。其实,虽然叫作独立主格结构,但并不是真正的独立,它还是一种从属分句,在句中有多种作用。如

21、:表原因、表条件、表方式、表伴随、表时间等,在句中通常起状语作用。有时还可以作定语。独立主格结构主要用于描绘性文字中,其作用相当于一个状语从句,常用来表示时间、原因、条件、行为方式或伴随情况等。例如:(1)表示时间The meeting being over,all of us went home.开完会后我们都回家了。the meeting being over相当于when the meeting was over。Her work done,she sat down for a cup of tea.她干完了活,坐下来喝茶。her work done相当于when her work wa

22、s done。(2)表示条件The condition being favorable,he may succeed.若条件有利,他或许能成功。the condition being favorable相当于If the condition is favorable。(3)表示原因There being no taxis,we had to walk.没有出租车,我们只好步行。There being no taxis相当于Since there was no taxi。He wrapped her up with great care,the night being dark and fros

23、ty.夜又黑又冷,所以他把她裹得严严实实的。the night being dark and frosty相当于as the night was dark and frosty。(4)表示伴随情况Almost all metals are good conductors,silver being the best of all.几乎所有的金属都是良导体,而银则是最好的导体。(=Almost all metals are good conductors,and silver is the best of all.)(5)表示补充说明*We redoubled our efforts,each m

24、an working like two.我们加倍努力,一个人干两个人的活。注:独立主格结构表示时间、条件或原因时,相当于一个状语从句,一般放在句首,表示原因时还可放在句末;表伴随状况或补充说明时,相当于一个并列句,通常放于句末。特点独立主格结构的逻辑主语与句子的主语不同,它独立存在。名词或代词与后面的分词,形容词,副词,不定式,介词存在逻辑上的主谓关系,即逻辑主语为动作执行者。独立主格结构一般有逗号与主句分开(不绝对)。【点拨迷津】1.独立主格与状语从句的转换:当状语从句的主语与主句的主语不是指同一个对象时,可用独立主格结构取代状语从句,但不再保留连词。如:After class was ov

25、er(=Class being over/Class over),the students soon left the classroom.下课后,学生很快离开了教室。2.不能省略being(having been)的情形:在下列三种情况下,独立主格结构中的being(或having been)不能省略。(1)独立主格的逻辑主语是代词时。如:It being Sunday,we went to church.因为是星期天,我们去做礼拜了。(2)在There being+名词的结构中。如:There being no bus,we had to go home on foot.因为没有公共汽车,

26、所以我们不得不步行回家。(3)当独立主格结构中 being done 表示“正在被做时”,being不可省略。如:The room being painted now,we cant go there.房间现在正在粉刷,我们不能去那儿。3.通常不用物主代词或冠词:在“名词(或代词)+介词短语”构成的独立主格结构中,一般不用形容词性物主代词和冠词。如:Mr Smith entered the classroom,book in hand.史密斯先生走进了教室,手里拿着一本书。4.独立主格结构没有所有格形式。如:The chief editor arriving,we began the meet

27、ing.主编来了,我们开始开会。【内化用】用括号中单词的适当形式填空。We shall thresh the wheat,weather _(permit).It _(be)National Day today,the streets are very crowded.This _(do),we went home.She gazed,her hands _(clasp)to her breast.permittingbeingdoneclasped【常温故勤总结】现在分词构成口诀现在分词用途多,进行时态不可缺。它的构成很好记,动词后缀-ing,词尾若有哑音e,去e再加-ing。一辅重读闭音节

28、,这个字母要双写。还有一点要注意,改ie为y再加-ing。注意:以上口诀可以归纳成九个字“直接加,去e加,双拼加。课时素养达标.单句语法填空1.Not _(know)where to go,she went to the police station for help.2.A little child _(learn)to walk often falls.3._(have)finished her homework,the little girl began to watch TV.4.The building _(be)built is our library.5._(have)been

29、warned by the teacher,the students didnt make such mistakes.6._(travel)is interesting but tiring.7.Janes _(be)so careless caused so much trouble.8.There was a terrible noise _(follow)the sudden burst of light.knowinglearningHavingbeingHavingTravelingbeingfollowing9.The visiting minister expressed hi

30、s satisfaction with the talks,_(add)that he had enjoyed his stay here.10._(see)from the top of the hill,we can find that the city looks more beautiful.addingSeeing.语法填空When we plant a rose seed in the earth,we notice it is small,but we do not criticize it as“rootless and stemless”.We treat it as a s

31、eed,1.(give)it the water and nourishment required 2.a seed.When it first 3.(shoot)up out of the earth,we dont condemn(指责)it as 4.(mature)and underdeveloped,5.do we criticize the buds for not being open when they appear.We stand in wonder at the process 6.(take)place,and give the plant the care it ne

32、eds at each stage of its development.The rose is a rose from the time it is a seed to the time it dies.Within it,at all times,it contains its whole potential.It seems to be 7.(constantly)in the process of change:Yet at each state,at each moment,it is perfectly all right 8.it is.A flower is not 9.(go

33、od)when it blooms than when it is merely a bud;at each stage it is 10.same thinga flower in the process of expressing its potential.【语篇概述】一粒微小的玫瑰花籽被植入土壤时,我们并不因它“无根无茎”而加以批评。我们把它当作一粒种子来对待,给它所需的水分和养料。一朵花,在每一个阶段都是相同的,无论是倾情绽放的花朵还是含苞欲放的花蕾,都是这朵花一朵时刻展现自己潜能的花。1.【解析】giving。考查分词。分析句式可知,We和give之间是主动关系,故使用现在分词作状

34、语。2.【解析】of。考查介词。这里的of表示所属关系,即一粒种子所需要的水和营养。3.【解析】shoots。考查时态。根据句意,叙述的是一种常识,故用一般现在时,主语为it,故使用第三人称单数形式。4.【解析】immature。考查形容词。根据句子里的underdeveloped可知,此处需填一个形容词与之并列,immature 表示未成熟的。5.【解析】nor。考查代词。根据前文的we dont condemn可知,为否定句,构成固定句型,“既不也不”。6.【解析】taking。考查分词。根据句意可知,the process和take place之间是主动关系,故使用现在分词。7.【解析】constant。考查形容词。分析句意可知,seems to be似乎,修饰该短语需用形容词形式,即constant,意思是不断的。8.【解析】as。考查连接词。此处的as为连词,意思是像一样。9.【解析】better。考查比较级。根据下文when it blooms than when it is merely a bud可知,此处是bud和bloom作比较。10.【解析】the。考查冠词。the same可作固定搭配,the same thing指同样的事情。