初中英语沪教牛津版（2024）七年级下册Unit 6 Electricity获奖课件ppt

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Master three grups f mdal verbs: can & cannt; may & may nt; must & must nt
Learn hw t use mdal verbs crrectly.
Use mdal verbs t express hw t use electrical appliance safely.
Learning bjects
We are Mnsters, Incrprated. We can pwer yur life. We can pwer yur car. We can warm yur hme. We can light yur city. In rder t have a better tmrrw, we must wrk hard. We shuld carefully match every child t their ideal mnster t prduce the best scream. The scream can be refined int clean and dependable energy.
Read the intrductin and pay mre attentin t the red wrds.
A can and cannt
We use can and cannt (can't) t say we are able r unable t d smething.
presentatin
都可表示能力,意思是“能,会”,can的否定形式是can’t (cannt),意思是“不能,不会”。在过去时态中则对应用culd和culdn’t。如:
can 和 be able t的区别：
I can fly a kite. / I can’t fly a kite.When I was six, I culd swim. / When I was six, I culdn’t swim.
be able t可以用于各种时态，并有人称和数的变化；can只有现在和过去两时态。
Can and Can’t
Presentatin
可以用来表示请求许可,意思是“能,可以”。此时can 一般用于平辈、熟人之间;culd语气较为委婉客气,一般用于向老师、父母和长辈请求许可。注意:这种用法中,答句都用can的适当形式。
--- Culd I watch TV nw, Dad?--- N, yu can’t. Yu must finish yur hmewrk first.
表示许可、允许,意为“可以”。
Yu can't play cmputer games n weekdays.We were ttally free. We culd d what we wanted.
can't 还可表示否定推测,意为“不可能”。It can't be true. 它不可能是真的。
Hi and L are talking abut themselves. What are they saying? Read their cnversatin and then cmplete the statements belw with can r cannt.
1. Hi _____ play ftball.2. L ________ paint.3. Hi ________ speak as many languages as L.4. Bth Hi and L _____ dance.5. L ________ drive a car, but he _____ play chess.6. Hi _____ swim, but he ________ play the guitar.
What can yu d? Tell the student behind yu and ask if he/she can d it. The next student shuld repeat this with anther student.
N, I can’t. I can sing. Can yu sing?
Yes, I can. I can … Can yu …?
I can swim. Can yu swim?
Yu will be given several situatins. After reading the descriptins and lking at the pictures, decide what yu wuld say in these situatins.
What wuld yu say?
1. A man is ging t see his bss. He is standing at the drway.
2. A student is ging t ask the teacher a questin.
3. A by is thirsty. He is asking his mther fr smething.
4. A shp assistant is serving a custmer.
B may and may nt
We use may and may nt t ask fr and give permissin. We als use can and cannt (can’t) fr the same purpse.
表示许可、允许,意为“可以”,常与第一人称连用,用 might 表示可能性较小,might 不表示过去时态,只是语气上比 may 更委婉。
对may开头的问句进行回答时,肯定回答用“Yes, please.”或“Certainly/OK/Sure.”等;否定回答用“Please dn’t.”或“N, yu mustn’t./N, yu can’t.”。
May I use yur pen?
may and may nt
May还可以表示没有把握的猜测,意为“可能”, 用于肯定句和否定句,不能用于疑问句。He may be at hme nw. 现在他可能在家里。She may nt be there tday. 今天她或许不在那里。
Daisy is nt feeling well tday. Benny is at hme with her. Read their cnversatin belw. Fill in the blanks with may r can.
Benny: Hw are yu feeling, Daisy?Daisy: Nt very well.Benny: _________ I get yu a chair?Daisy: Yes, thanks.Benny: I’m ging ut. _____ I brrw yur bicycle, Daisy?Daisy: Yes, yu may. Befre yu g t meet yur friends, can yu cme and see the dctr with me?Benny: Yes. I _____. ______ I carry yur bag fr yu?Daisy: Yes, that’s very kind f yu, Benny. I’m ready t g. ____ yu pen the dr fr me?Benny: Yes, I can.Daisy: Thanks.
What d these signs mean?
Yu mustn’t smke here.
Yu mustn’t fish here.
Yu mustn’t use yur mbile phne here.
Yu mustn’t take phts.
C must and must nt
We use must and must nt (mustn't) t tell peple what t d r what nt t d.
以must开头的疑问句,否定回答用needn’t或dn’t have t。— Must I g there with yu?— N, yu needn’t / dn’t have t.
表示肯定推测,意思是“一定”,语气较肯定,较有把握。He must be a teacher.
must 和 must nt
must nt (mustn’t) 表示禁止、不准
Yu mustn’t tell him abut it.Yu mustn’t play fire.
must 和 have t二者都是“必须”的意思,have t表示客观需要,must表示说话人的主观看法,即主观上的必要。
My brther was very ill, s I had t call the dctr in the middle f the night.He said that they must wrk hard.
I must drink mre water.____________________________________________________________I must nt _________________________________________________________________________________
I must g t bed early.
I must take the medicine n time.
eat cld fd.
I must nt g ut alne.
I must nt share cups with thers.
Daisy saw a dctr. The dctr tld her what t d and what nt t d. Help her write dwn the dctr’s instructins.
drink mre water g t bed earlyeat cld fd share cups with thersg ut alne take the medicine n time
Mdal Verbs情态动词后接动词______，没有人称和数的变化， ______（能/不能）单独作谓语，要与后面的______共同作谓语。其否定形式是在其后面直接加______ 。情态动词can 的用法：表示能力。构成一般疑问句时，需把can 移到______（句首/中）。肯定回答为“Yes,主语+ ______”；否定回答为“N,主语+ ____________”。
can’t / cannt
情态动词may 的用法：表示允许。may在表达这个意思时可以与can 互换使用。由may 引起的一般疑问句，其否定回答用________，_____________ 或 ________ 。表示请求时，culd 和can 不表示时态的区别，只是culd的语气更加委婉。情态动词must 的用法：表示必须/一定。其否定形式mustn’t 表示______。由must引起的一般疑问句，其否定回答要用_______ 或_____________。
dn’t have t
1. — Kate, yu have wn the English cmpetitin! — Oh, it _______ be true. I made a lt f mistakes in it.2. Yu ________ talk t yur grandparents like that. It’s implite.3. We _______ wash ur hands befre meals. It is gd fr ur health.
一、用本单元所学的情态动词填空。
4. Excuse me, ____ yu tell me the way t the nearest park?5. Yu __________ g with us t the z if yu want t.6. I _____ speak Chinese very well, but I ______ speak French at all.
( )1. If yu feel tired, yu ____ sit n this chair and have a rest.A. mustB. can C. needD. can’t( )2. --- ____ I watch TV nw, Mum? I finished my hmewrk. ---Yes, yu ____. A. Must, need B. May, can C. Need, need D. May, must
二、选择最佳答案填空。
( )3. He ____ see the wrds n the blackbard because he sits far away.A. mustn’tB. may ntC. can’tD. needn’t( )4. — ____ I d all the husewrk nw? — N, yu ____. Yu can d it later. A. Must, mustn’t B. Must, can’t C. Must, may nt D. Must, needn’t
1. 门锁了。他不可能在家。The dr is lcked. He ______ be at hme.2. 我的手表停了，肯定有毛病。My watch desn’t wrk. There _______ be smething wrng with it.3. — 我可以借用你的尺子吗？ — 当然可以。但是你必须明天还给我。— ______ I brrw yur ruler?— Of curse. But yu _______ return it t me tmrrw.
Hmewrk
Finish Grammar exercise paper.
Electricity is a frm f energy that can be carried by wires and is used fr heating and lighting, and t prvide pwer fr machines.