新概念第二冊(cè)17課

1、精選課件1She is an actress, too. Which picture do you think is her now? NowbeforeShe often appears on the stage as a young girl. 徐若瑄 精選課件2She is an actress，too. Which picture do you think is her now?Now16 years agoDoes she look young?Do you think how old she is? She must be at least 精選課件3at leastat + (

2、the ) + 最高級(jí)最高級(jí)表示表示“最最”，“至至”at most 至多，最多至多，最多at first 最初，首先最初，首先 at the earliest 最早最早at least 至少，最少，起碼至少，最少，起碼 at last 最后，終于最后，終于 at the latest 最晚最晚e.g. There can be no more than fifty people in the audience at ( the ) most. At least two hundred have left.精選課件4discussiondiscussion1.How old is your m

3、other/father?2. Do they look young?3.Does your mother have any good way to stay young?4.Do they do a lot of exercises?5.Do they use any cosmetics【kzmetiks (化妝品）? 6. Do you have any good suggestions for staying healthy?精選課件5Always young精選課件6精選課件7My aunt Jennifer This timeIn the playLast yearWhen bein

4、g asked how old she isShe answered:a girl of seventeenDarling, it must be terrible to be grown up!精選課件8My aunt Jennifer is an actress. She must be at least thirty-five years old. In spite of this, she often appears on the stage as a young girl.must：在這里表示很肯定的推測(cè)：在這里表示很肯定的推測(cè)at least：at most in spite of

5、 ：but, however精選課件9in spite of e.g. We went out in spite of the rain. In spite of the fact that he was angry, he helped me. Although he was angry, he help me.盡管，雖然，不管精選課件10appear v.appearance n.disappear v.disappearance n.appear as : 扮演扮演.角色角色on the stage;在舞臺(tái)上在舞臺(tái)上精選課件11Special difficultiesSpecial di

6、fficulties as: prep. = in the position of 作為作為 e.g. He works as an engineer. He works like an engineer. conj. = because 因?yàn)橐驗(yàn)?e.g. I cannot come as I am busy. = at the time when e.g. As I was leaving the house , the postman brought a letter. = in the way that 按照按照的方式的方式 e.g. Do as you are told.精選課件12

7、Jennifer will have to take part in a new play soon. This time, she will be a girl of seventeen. In the play, she must appear in a bright red dress and long black stockings. take part in：join, enter fora girl of 17：a 17-year- old girlWhat does a girl of 17 look like? What will she wear?精選課件13Special

8、difficultiesSpecial difficultiesdress：” 女服女服 ” “ 女禮服女禮服”suit: “ 男裝男裝 ” “ （一套）衣服（一套）衣服 ” costume: 在特別場(chǎng)合下穿的衣服，如戲服，在特別場(chǎng)合下穿的衣服，如戲服，化裝舞會(huì)上的服裝化裝舞會(huì)上的服裝 e.g. All the actors wore the fifteenth-century costumes精選課件14 Last year in another play, she had to wear short socks and a bright, orange-coloured dress. If

9、 anyone ever asks her how old she is, she always answers, Darling, it must be terrible to be grown up!If anyone ever asks her how old she is,精選課件15orange coloredn.+ed=adj.a pair of high-heeled shoes 一雙高跟鞋一雙高跟鞋a white-haired doctor 一個(gè)白發(fā)蒼蒼的醫(yī)生一個(gè)白發(fā)蒼蒼的醫(yī)生a honey-mouthed boyfriend 一個(gè)甜言蜜語的男友一個(gè)甜言蜜語的男友精選課件16i

10、n：穿穿衣服衣服bright red：亮紅，亮紅， dark green?sock n. 短襪短襪 old socks =buddy老兄老兄 Pull up your socks！【諺語】【諺語】 鼓起勁來！鼓起勁來！精選課件171._ aunt Jennifer_an actress. Myis2._ _at least _ years old. She must bethirty-five3.In spite of this,_ _appears_ the stage _a young girl. sheoftenonas精選課件181.Jennifer_ _take part in_ _

11、. will have toa new play soon2.This time,_ _a girl of seventeen. shewill be3._ the play,_ _ appear _ _ bright red dress _ long black stockings. Inshemustinaand精選課件191.Last year_ _ play, _had to wear short socks _ _bright,orange-coloured dress. inanothersheanda2._anyone_asks_how old_ _, _ _ answers,D

12、arling,_ _terrible_grown up! Ifeverhersheisshealwaysitmust beto be精選課件20mustmust 表達(dá)義務(wù)，表達(dá)義務(wù)， have to have to 必須必須musthave to強(qiáng)調(diào)主觀I dont like it. I must leave.強(qiáng)調(diào)客觀Its late. I have to go單一時(shí)態(tài)不能用于will和shall 后時(shí)態(tài)豐富have to / had to/ will have to 否定表示不允許mustnt非其否定回答否定表示不需要neednt ，dont have to 精選課件21mustmust2.

13、 2. 表達(dá)推測(cè)表達(dá)推測(cè) must+v. ( (原原) ) 表示對(duì)現(xiàn)在情況的肯定推測(cè)表示對(duì)現(xiàn)在情況的肯定推測(cè)e.g. Mary must have some problem. She keeps crying. must+have+done 表示對(duì)過去情況的肯定推測(cè)表示對(duì)過去情況的肯定推測(cè)e.g. I called very loud. He must have heard me.精選課件22mustmust3. mustnt 表示禁止表示禁止 e.g. You mustnt smoke here.4. 4. 表示抱怨表示抱怨 e.g. Why must it rain again on Su

14、nday ?精選課件23Key structures 情態(tài)動(dòng)詞情態(tài)動(dòng)詞must must 主觀 必須 have to 客觀 have got to 客觀 現(xiàn)在must do 表推測(cè) 過去must have done精選課件24eg. 你必須少抽些煙。你必須少抽些煙。 You must cut down on smoking. Im afraid I must go now.eg. Must you leave now? Yes, I must./ No, I neednt.精選課件25Key structureslmust與與have to一般可互換，但表示一般可互換，但表示“必須必須” 時(shí)，

15、時(shí)， must著重說明主觀看法，著重說明主觀看法， have to比較強(qiáng)調(diào)客觀需要。比較強(qiáng)調(diào)客觀需要。eg. I must tidy up the room. 我必須打掃一下房間。（主觀想法）我必須打掃一下房間。（主觀想法） I have to tidy up the room. 我不得不打掃一下房間。（客觀需要）我不得不打掃一下房間。（客觀需要）精選課件26Key structuresl have to有人稱、數(shù)、時(shí)態(tài)的變化，而有人稱、數(shù)、時(shí)態(tài)的變化，而must沒有沒有eg. I had to go to see the dentist. She had to go shopping yes

16、terday.在否定結(jié)構(gòu)中在否定結(jié)構(gòu)中： dont have to 表示表示“不必不必”mustnt表示表示“禁止禁止”eg. You dont have to tell him about it. 你不一定要把此事告訴他。你不一定要把此事告訴他。 You mustnt tell him about it. 你一定不要把這件事告訴他。你一定不要把這件事告訴他。精選課件27Key structureslmust be可用來表示對(duì)現(xiàn)在情況的推測(cè)，（只可用來表示對(duì)現(xiàn)在情況的推測(cè)，（只有在有在肯定句肯定句中能這樣用，這種揣測(cè)比中能這樣用，這種揣測(cè)比may be表示的要肯定得多）：表示的要肯定得多）：eg. He must be working in his office. She must be over forty.試比較：eg. He must be staying there. 他現(xiàn)在肯定呆在那里。他現(xiàn)在肯定呆在那里。 He must stay there. 他必須呆在那。他必須呆在那。 精選課件28Key structureslmust 表示對(duì)已發(fā)生的事情的推測(cè)時(shí)，要表示對(duì)已發(fā)生的事情的推測(cè)時(shí)，要接完成式接完成式。eg. I didnt hear the