新概念第二册17课

1、精选课件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 精选课件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 精选课件3at leastat + (

2、the ) + 最高级最高级表示表示“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，起码至少，最少，起码 at last 最后，终于最后，终于 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.精选课件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 (化妆品）? 6. Do you have any good suggestions for staying healthy?精选课件5Always young精选课件6精选课件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!精选课件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：在这里表示很肯定的推测：在这里表示很肯定的推测at least：at most in spite of

5、 ：but, however精选课件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.尽管，虽然，不管精选课件10appear v.appearance n.disappear v.disappearance n.appear as : 扮演扮演.角色角色on the stage;在舞台上在舞台上精选课件11Special difficultiesSpecial di

6、fficulties as: prep. = in the position of 作为作为 e.g. He works as an engineer. He works like an engineer. conj. = because 因为因为 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.精选课件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?精选课件13Special

8、difficultiesSpecial difficultiesdress：” 女服女服 ” “ 女礼服女礼服”suit: “ 男装男装 ” “ （一套）衣服（一套）衣服 ” costume: 在特别场合下穿的衣服，如戏服，在特别场合下穿的衣服，如戏服，化装舞会上的服装化装舞会上的服装 e.g. All the actors wore the fifteenth-century costumes精选课件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,精选课件15orange coloredn.+ed=adj.a pair of high-heeled shoes 一双高跟鞋一双高跟鞋a white-haired doctor 一个白发苍苍的医生一个白发苍苍的医生a honey-mouthed boyfriend 一个甜言蜜语的男友一个甜言蜜语的男友精选课件16i

10、n：穿穿衣服衣服bright red：亮红，亮红， dark green?sock n. 短袜短袜 old socks =buddy老兄老兄 Pull up your socks！【谚语】【谚语】 鼓起劲来！鼓起劲来！精选课件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精选课件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精选课件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精选课件20mustmust 表达义务，表达义务， have to have to 必须必须musthave to强调主观I dont like it. I must leave.强调客观Its late. I have to go单一时态不能用于will和shall 后时态丰富have to / had to/ will have to 否定表示不允许mustnt非其否定回答否定表示不需要neednt ，dont have to 精选课件21mustmust2.

13、 2. 表达推测表达推测 must+v. ( (原原) ) 表示对现在情况的肯定推测表示对现在情况的肯定推测e.g. Mary must have some problem. She keeps crying. must+have+done 表示对过去情况的肯定推测表示对过去情况的肯定推测e.g. I called very loud. He must have heard me.精选课件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 ?精选课件23Key structures 情态动词情态动词must must 主观 必须 have to 客观 have got to 客观 现在must do 表推测 过去must have done精选课件24eg. 你必须少抽些烟。你必须少抽些烟。 You must cut down on smoking. Im afraid I must go now.eg. Must you leave now? Yes, I must./ No, I neednt.精选课件25Key structureslmust与与have to一般可互换，但表示一般可互换，但表示“必须必须” 时，

15、时， must着重说明主观看法，着重说明主观看法， have to比较强调客观需要。比较强调客观需要。eg. I must tidy up the room. 我必须打扫一下房间。（主观想法）我必须打扫一下房间。（主观想法） I have to tidy up the room. 我不得不打扫一下房间。（客观需要）我不得不打扫一下房间。（客观需要）精选课件26Key structuresl have to有人称、数、时态的变化，而有人称、数、时态的变化，而must没有没有eg. I had to go to see the dentist. She had to go shopping yes

16、terday.在否定结构中在否定结构中： 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诉他。你不一定要把此事告诉他。 You mustnt tell him about it. 你一定不要把这件事告诉他。你一定不要把这件事告诉他。精选课件27Key structureslmust be可用来表示对现在情况的推测，（只可用来表示对现在情况的推测，（只有在有在肯定句肯定句中能这样用，这种揣测比中能这样用，这种揣测比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.试比较：eg. He must be staying there. 他现在肯定呆在那里。他现在肯定呆在那里。 He must stay there. 他必须呆在那。他必须呆在那。 精选课件28Key structureslmust 表示对已发生的事情的推测时，要表示对已发生的事情的推测时，要接完成式接完成式。eg. I didnt hear the