2021学年Unit 3 Language in use .图文课件ppt

这是一份2021学年Unit 3 Language in use .图文课件ppt，共23页。PPT课件主要包含了Talk等内容，欢迎下载使用。
情态动词must/must nt (mustn't)can/can nt (can't)need/need nt (needn't)
(1) Yu must use red paper fr hngba  because red means luck.  你必须用红纸做红包，因为红色代表幸运。
否定形式 must nt (mustn't) 表示“不能”或“禁止”的意思。
(2) In my hme twn, peple say yu mustn't d any cleaning n the first day f the Spring Festival.  在我的家乡，据说大年初一不能打扫卫生。
(3) Must I cme befre 6:30 tmrrw?  明天我必须在六点半之前来吗？
must 表示“必须，一定要”，可用于肯定句、否定句和疑问句。
(3) Must I cme befre 6:30 tmrrw?  明天我必须在六点半之前来吗？ Yes, yu must.  是的，你必须在那之前到。(表示一定要) N, yu needn't/yu dn't have t.  不，你不必在那之前来。(表示没必要)
注意：否定回答不可以用 mustn’t。
(1) When yu get t knw each ther better r when they ask yu t, yu can just use their first names.  当你们更加熟悉或他们请你(这样做)时，你就可以只称呼他们的名字了。(2) Yu can't put the milk in first.  你不能先倒牛奶。(3) Can we g hme nw, please?  请问我们现在能回家吗？
can 表示“许可，可以”，可用于肯定句、否定句和疑问句。
否定形式 cannt (can't)表示“不能，不可以”，语气弱于 must nt (mustn't)。
注意：本模块所学的can与以前所学的can意义不同，以前所学的 can 表“能力”，这里表“允许”。
(3) Can we g hme nw, please?  请问我们现在能回家吗？ Yes, yu can.  可以。(表示允许) N, yu can't.  不行。(表示不允许)
(1) If she wants anything, she need nly ask.  如果她要什么，说一下就行了。
(2) Yu needn't wait.  你不必等待。
need 作情态动词表示“需要”，可用于肯定句、否定句和疑问句。
(3) Need I reprt it t the plice? 我要向警方报告这件事吗？
否定形式 need nt (needn't) 比较常用，表示“不需要”或“不必要”。
(3) Need I reprt it t the plice?  我要向警方报告这件事吗？
N, yu needn't.  不，没必要。 (表示没必要)
Yes, yu must.  是的，你必须报告。 (表示必须做)
(1) I need t clean the huse.  我需要把房子打扫一下。(2) Yu dn't need t leave nw. 你没必要现在走。
注意，need 也可以作行为动词，表示“需要”，常用于 need t d sth. 结构。
(1) My bike was brken yesterday, s I had t walk t schl.  昨天我的自行车坏了，所以我只能走路去学校。(2) Kate has t travel a lt because f her jb. 因为工作，凯特不得不经常出差。(3) All passengers must wear seat belts.  所有乘客都要系安全带。
侧重说话者的主观看法，认为有必要，有义务去做某事
侧重于客观需要，有“被迫；不得不”之意
4. have t 与 must 的区别
(1) Yu dn't have t tell him abut it. 你不必告诉他这件事。(他可能知道了或者没有必要让他知道)(2) Yu mustn't tell him abut it. 你绝对不要告诉他这件事。 (可能是秘密)
must nt/mustn't
d nt/dn't have t (= needn’t)
Yu'd better get sme sleep.你最好睡一会儿。
Yu'd better nt waste any mre f yur time.你最好别再浪费你的时间了。
had better 表示劝告或建议，意思是“最好……”。
had better 的否定形式为 had better nt。
had better 一般不用于疑问句中。
1 A: Can yu drive a car at the age f seventeen in England? B: Yes, we ____. Hw abut in China? A: N, we ______.2 A: Can yu pen a gift immediately after yu receive it in England? B: ___________. What abut in China? A: N, we usually dn’t. 3 A: Can yu push yur way nt a bus in England? B: ___________. Hw abut in China? A: N, we _____ either.4 A: Can yu drive n the right-hand side f the rad in England? B: ___________. What abut in China? A: Yes, we must.
Yes, we can
N, we can't
Cmplete the cnversatins with can r can’t.
Schl rules1 Yu ________ be late fr schl.2 Yu ________ eat in the library.3 Yu ________ ride yur bike in the playgrund.4 Yu _____ d yur hmewrk.5 Yu _____ listen t the teacher.
Cmplete the sentences with must r must nt.
It is imprtant t knw what yu must and must nt d when yu meet peple frm a different cuntry. Yu (1) may / must nt ask Westerners “Hw ld are yu?” because it is nt plite. Yu (2) might / can knw smene well, but yu (3) must / need nt ask “Hw much mney d yu make?” He (4) may / can never speak t yu again! In public places, yu (5) must / can ask peple befre yu take phts f them, and yu (6) must nt / might nt eat r drink in shps r museums. In sme cuntries yu (7) cannt / can g int smene’s huse with yur shes n. Yu (8) need nt / must nt take them ff. But in sme ther cuntries yu (9) might / must nt wear shes in the huse.
Underline the crrect wrds.
1. _________________________________ _______________________________2. _________________________________ _______________________________
He can g ut with his friends at weekends.
He can play music ludly befre ten ’clck at night.
Listen again. What tw things des he say he can d?
-I must visit my grandparents nce a week. I mustn’t stay up late in the evening.- …
1. Use yur __________ t lk up any wrds yu d nt understand.2. Mst Chinese peple eat ndles with ____________.3. Jenny culd nt wait t pen her birthday ________.4. He thinks it is cl t wear his __________ back-t-frnt.5. Where is my __________? Let's play a game.
baseball cap
Cmplete the sentences with the wrds r expressins in the bx.
baseball cap chess set chpsticks dictinary presents
baseball capbike chess set chclate chpsticks dictinary fish and chips litter pht vide game
A: Many peple have ne.B: Is it a chess set?A: N. Yu use it t get t places.C: Is it a bike?A: Yes.
Giving advice t freign guests wh are visiting a Chinese family
Write sme advice fr freign visitrs t a Chinese family. Think abut:
What must they wear?What mustn't they talk abut?What can't they d?What presents can they bring?When must they arrive?…
Send the advice f the whle class t yur freign friends r pst it n yur class blg.
Shw the advice yur grup chse in Step 2 t the whle class. Put the pieces f advice tgether t frm the advice f the whle class.
Wrk in grups. Shw the advice yu wrte in Step 1 t yur grup members. Chse tw best pieces f advice.