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1、Unit 2 Witnessing time 课 题M9U2课时9-7Grammar主备人授 课 时 间200809教 学 目 标1.Learn the usages of the present and past participles2. Do some exercises about this usage教学重、难点1.grasp the usages of the present and past participles2. How to do some exercises about this usage教、 学 具Slides, Multi-media教学手段Workbook教 师
2、 活 动 内 容、方 式学生活动内容、方式旁 注Step1: Lead-inCompare and identify their functions of these participles (1).The boy sitting under that tree is my brother.(as an adjective)(2).The boy followed by a dog is my brother. (as an adjective)(3).Hearing the news, they got excited. (as an adverb)Step 2: AnalysisRead
3、the guidelines and Part 1 on page 24 and encourage the Ss to tell the functions of participle clauses in the following sentences.(1).The building completed last month is a bank (an attributive)(2).The bird flu sweeping through Asia has jumped from birds to humans recently. (an attributive) (3)Thecup
4、 dropped to the ground, breaking into pieces .(an adverbial)(4).I heard her singing an English song when I passed by her room yesterday. (a complement)(5)The peasants had the tractor working day and night at harvest time. (a complement)Step3 Practise Do the exercise on page 25, using a participle cl
5、ause to rewrite the sentences. Then finish Parts C1 and C2 on P 112 in workbook. For reference:现在分词和过去分词的用法现在分词和过去分词主要差别在于：现在分词表示“主动和进行”，过去分词表示“被动和完成”(不及物动词的过去分词不表示被动，只表示完成)。分词可以有自己的状语、宾语或逻辑主语等。 1) 分词作状语分词在句子中作状语，可以表示时间、条件、原因、结果、让步、伴随等。分词做状语时，它的逻辑主语与句子的主语一致。作状语的分词相当于一个状语从句。e.g:Hearing the news, they
6、 all jumped with joy. 分词在句子中作状语，使用何种分词，要取决于分词与句子主语的关系：主谓关系用现在分词，动宾或被动关系用过去分词。.No matter how frequently _, the works of Beethoven always attract large audiences. (CET-4 19)A. performing B. performedC. to be performed D. being performed2)“while ( when, once, until, if , though等连词)分词”结构现在分词或过去分词作状语时，有时
7、可以在分词前加while，when, once, although, until, if等连词。e.g:When leaving the airport, she waved again and again to us.3)分词作定语时，单个的分词通常放在被修饰的名词之前，分词短语一般置于所修饰的中心词后面。现在分词修饰的是发出该动作的名词(即与名词有主谓关系),过去分词修饰承受该动作的名词(即与名词是动宾关系)。e.g:.As early as 1649 Ohio made a decision that free, tax-supported schools must be establi
8、shed in every town _50 households or more. (CET-4 1998,1) A) having B) to have C) to have had D) having had4)分词作宾语补足语现在分词在see, watch, hear, observe, notice, feel, find, glimpse, glance等感官动词和look at, listen to等短语动词以及have, keep, get, catch, leave, set, start, send等使役动词后与名词或代词构成复合宾语，作宾语补语的成分。e.g:On the
9、 top of the hill, we could see smoke rising from the chimneys in the village.过去分词可以在allow, ask, consider, desire, expect, feel, find, get,have, hear, imagine, keep, like, make, observe, order, permit, prefer, remember, request, require, see, urge动词等后面作宾语补足语。e.g:After my encounter with her, I found m
10、yself greatly shaken.在动词see, hear, feel, watch, notice，perceive，observe, listen to, look at后既可用现在分词做补语,也可用不定式做补语。用现在分词表示动作正在进行,用不定式表示的动作的全过程已经完成.e.g:I saw Mr. White looking into a shop window. 5)分词作表语 分词作表语通常看作形容词来用。现在分词表示主语的性质，而且主语多为物；过去分词表示主语的感受或状态，主语多为人。e.g:The film “Pearl Harbor” is really excit
11、ing.Step 4 Consolidation: 1.Hi,Mary.Wouldyouliketogototheconcertthisevening?Sorry,Tom._tomorrowslessons,Ihavenotimetogooutwithyou.A.Notpreparing B.NothavingpreparedC.Nottoprepare D.Beingnotprepared2.Thebuilding_willbecompletedinamonth.Itwillbeourlab.A.topaint B.beingpainted C.tohavepaintedD.painting
12、3.Withhisson_，theoldmanfeltunhappy.A. to bedisappointed B.disappointingC.beingdisappointed D.todisappoint4.TheEnglishexamisnotdifficult,isit?_.EvenTom_tothetopstudentsfailedinit.A. Yes;belongs B.No;belongedC.Yes;belonging D. No;belonging5. We all know that, _, the situation will get worse. （07全国I）A. not if dealt carefully with B. if not carefully dealt with C. if dealt not carefully with D. not if carefully dealt withSs answer the questionsSS finish off the exercise as practiceA participle clause can be used as an attributive, an adverbial or a complement
