
T learn abut the mdal verbs can, may and must.
Have A L k
1. We can use electricity t d many things.2. ---Can yu think f an example? ---Yes, I can./ N, I cannt/can’t.3. ---May/Can I use yur mbile phne? ---Yes, yu may/can. ---N, yu may nt/can’t.4. Yu must nt/mustn’t d that, Benny.5. We must always be careful with electricity.
A can and cannt
We use can and cannt (can’t) t say we are able r nt able t d things.
①We can use electricity t d many things.②We cannt/can’t see electricity.③---Can yu think f an example? ---Yes, I can./N, I cannt/can’t.
can表示某人具備能力做某事,意為“能;會” 。
can & can’t
①I can play the pian quite well.我能把鋼琴彈得相當(dāng)好。②She cannt swim.她不會游泳。③— Can yu slve the math prblem? 你能做出這道數(shù)學(xué)題嗎? — Yes, I can./ N, I can’t. 是的,我能。/不,我不能。
肯定句: 主 + can + 動詞原形 ……
否定句: 主 + can’t (cannt) + 動詞原形 ……
一般疑問句: Can + 主 + 動詞原形 …?肯定回答:Yes, 主+can.否定回答:N,主+can’t.
A Hi and L are talking abut themselves. What are they saying? Read their cnversatin and then cmplete the statements belw with can r cannt.
B may and may nt
We use may and may nt t ask fr and give permissin. In less frmal situatins, sme peple like t use can and cannt fr the same purpse.
①---May/Can I use yur mbile phne? ---Yes, yu may/can. ---N, yu may nt/can’t.②Yu may/can turn n the TV.③Yu may nt/cannt play in the kitchen.
may & may nt
①Yu may/ can turn n the TV.你可以打開電視機(jī)。②Yu may nt/ cannt play in the kitchen.你不可以在廚房玩耍。③—May I cme in? — 我能進(jìn)來嗎? —Yes, yu may/ can. /N, yu may nt/ can’t. —是的,你能。/ 不,你不能。
may意為“能;可以”,表示提出委婉的請求或表示許可。can也可用來征求意見或表示許可,一般可互換,但是may比較正式,can則比較口語化。
肯定句: 主 + may/can + 動詞原形 ……
否定句: 主 + may nt/ cannt + 動詞原形 ……
一般疑問句: May + 主 + 動詞原形 …?肯定回答:Yes, 主+may/can.否定回答:N,主+may nt/can’t.
may 較多用于一般疑問句中。
Daisy is nt feeling well tday. Benny is at hme with her. Read their cnversatin belw. Fill in the blanks with may r can.
We use must and must nt (mustn’t) t tell peple what t d r what nt t d.
C must and must nt
①Yu must nt/mustn’t d that, Benny!②We must always be careful with electricity.③They must nt/mustn’t play near the heater.
①I must phne my sister.我必須給我姐姐打個電話。②Yu must visit us while yu’re in Lndn.你在倫敦期間一定要來看我們。③Yu mustn’t tell the news t anyne else.你一定不能把這個消息告訴其他人。④Yu mustn’t drink the water frm the river.你們不能喝這河里的水。
must & mustn’t
must表示“必須做某事”或“一定要做某事”,具有強(qiáng)制性。
肯定句: 主 + must + 動詞原形 ……
否定句: 主 + mustn’t + 動詞原形 ……
Find ut the usages -- must
1.We must be careful with the fire. 2. Yu mustn’t play near the heater. 3. Must I finish all my hmewrk?4. N, yu needn’t./Yes, yu must.
觀察must此時表示什么?
T tell peple what t d r what nt t d.
Daisy saw a dctr. The dctr tld her what t d and what nt t d. Help her write dwn the dctr’s instructins.
I must g t bed early.
I must take the medicine n time.
I must nt g ut alne.
I must nt share cups with thers.
Yu will be given several situatins. After reading the descriptins and lking at the pictures, decide what yu wuld say in these situatins.
a. A man is ging t see his bss. He is standing at the drway.
May I cme in?
b. A student is ging t ask the teacher a questin.
May I ask yu a questin?
c. A by is thirsty. He is asking his mther fr smething.
May I have sme water?
d. A shp assistant is serving a custmer.
May I help yu?
What d these signs mean?
(Yu mustn’t smke here.)
(Yu mustn’t climb this ladder.)
(Yu mustn’t swim here.)
(Yu mustn’t use yur mbile phne here.)
Wrk ut the rule
注: wrd 文檔點(diǎn)擊此處鏈接
Ⅰ. 用情態(tài)動詞can/may/must或其否定形式完成句子。1. Jenny is blind, s she ________ see anything.2. — Excuse me. ________ I use yur umbrella? — Of curse. Here yu are.3. Yu _____________ play with a knife. It’s dangerus.4. Jim ________ play basketball well. It’s easyfr him.5. — ________ I return the bk t the librarytday? — Yeah. Yu see, tday is the deadline (截止日).
mustn’t/can’t
Ⅱ. 根據(jù)所給漢語提示,完成下列句子。每空一詞。1. 他會唱歌和彈吉他。He ________ ________ and play the guitar.2. 明天我可以帶我的朋友去那兒嗎?________ ________ take my friend there tmrrw?3. 你一定不要告訴你爺爺這個壞消息。Yu ________ ________ yur grandpa the bad news.4. 這只鳥翅膀受傷了,它不能飛了。The bird hurts its wing and it _______ _______.5. 我可以看一下你的郵票集嗎?____________ ___ have a lk at yur cllectin f stamps?
can sing
May/Can I
mustn’t tell
can’t fly
May/Can I
6. 每個人必須六點(diǎn)前完成工作。Everyne _______ _______ the wrk befre six ’clck.7. “我可以和你去嗎?”“不,不可以?!薄癕ay I g with yu?” “N, yu ________ ________.”8. 十點(diǎn)半了,我們必須出發(fā)去火車站了。It’s ten thirty and we ________ ________ fr the train statin.
must finish
may nt
must leave
Ⅲ. 改錯。將正確的句子寫在橫線上。1. Sam is frm the US, but he can speaking Chinese. ( )2. — Excuse me. May I sit here?( )3. — Must yu help me with my Maths, Jack? — Yes, I can. ( )4. Yu may play here. It’s against the rule. ( )___________________________________
may nt/can’t/mustn’t
Ⅳ. 翻譯下列句子。1. 我們可以用太陽能發(fā)電。_______________________________________________2. 我可以借用一下你的詞典(dictinary)嗎?_______________________________________________3.每個人出門必須戴口罩(wear a mask)。_______________________________________________
Everyne must wear a mask when they g ut.
4. 兒童禁止在路邊踢球。 ______________________________________________________5. 人們禁止在加油站(gas statin)吸煙。 _____________________________________________________6. -我必須今晚完成所有任務(wù)嗎?-不,不需要______________________________________________________
We can use slar pwer t prduce electricity.
May I use yur dictinary?
Children mustn’t play ftball n the radside.
-Must I finish all the tasks tnight? –N, yu needn’t.
Peple mustn’t smke at the gas statin.
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