unit15SectionA1weretryingtosavethemanatees1.ppt

1、Unit 15 Were trying to save the manatees!,Section A Period 1,How much do you know about endangered animals? How many endangered animals can you say? Can you recognize the endagered animals in the photos below?,Warming up,Panda Panda is one of the endangered animals.,Yangtze River Dolphin (白鳍豚) Its l

2、isted as one of the 12 most endangered animal species in the world.,Siberian Tiger (东北虎) According to statistics, the Siberian tigers left at present, are less than 20.,Whats this? And how to describe it?,enormous, gray,African elephants,1a,noisy,chimpanzees,playful,kangaroos,gentle, shy,manatees,sp

3、otted, fast,cheetahs,aggressive, furry,polar bears,1b Listen and circle the words in 1a that Victor and Ginny use to describe the animals.,gentle furry enormous playful noisy shy aggressive gray fast spotted,A: I am like this animal because I am strong and intelligent. I like water and I like to eat

4、 vegetables. B: Youre like an elephant. A: No. B: Youre like a manatee. A: Yes!,1c Groupwork,Its enormous, its about 10 feet long and weighs 1000 pounds, but its gentle and kind of shy. Their favorite habitat is in the water under the trees in mangrove swamps(红树林沼泽地). They eat aquatic feed (水生植物). S

5、ometimes, a female manatee can feed its baby like a woman, so its called “mermaid”(美人鱼). But now, some of the swamps have become polluted. Also, there sometimes isnt enough food for all of them. So they are,endangered!,2a Listening,Listen and complete the chart.,2b,2,500 in the U.S.,water under tree

6、s in mangrove swamps,swamps polluted. not enough food.,large, 10 feet long, weighs 1,000 pounds,2c Pairwork,A: How big are manatees? B: Theyre about 10 feet long and they weigh about 1,000 pounds. A: Where do they live?,B: Their favorite habitat is the water under the trees in mangrove swamps. A: Wh

7、y are they endangered? B: Some of the swamps have become polluted. Also, there sometimes isnt enough food for all of them.,1. I am like this animal because I am strong and intelligent. be like = look like = be similar to 像，看起来像。 e.g. He is like his father. 他像他的父亲。 = He looks like his father. = He is

8、 similar to his father.,Explanation,这里的like作介词，意思为“像”，like 还可做动词用，表示“喜欢”，like（doing）sth. 喜欢做某事。 e.g. He likes his father very much. 他很喜欢他的父亲。 Mary likes playing volleyball. 玛丽喜欢打排球。,2. How big are manatees? 海牛有多大？ how big. 询问体重。以how组合的疑问词组有很多，如： how old 询问年龄 how often询问频率 how long询问动作持续的长短 how much询

9、问质量或者价钱 how far 询问距离 how many询问数量 how soon 询问过多久,3. they weigh about 1,000 pounds, 他们大约重1000磅。 weigh v. 称重量，测重量 e.g. He weighed the stone in his hand. 他用手掂了掂这块石头的重量。 The piece of meat weighs four pounds. 这块肉重四磅。,weight 还可用做名词，重量。 e.g. What is your weight？ 你的体重是多少？,4. Were trying to save the manatees

10、. 我们正在竭尽全力拯救海牛。 try to do =try ones best to do 努力去做某事。 e.g. Every student should try to study hard in order to study in a university. 为了进入大学学习, 每个学生都应该努力学习。,do / does,did,be (am / is / are) doing,have / has done,was / were done,have / has been done,Grammar,1. 当我们不知道动作的执行者时。 e.g. Look! There is nothi

11、ng here. Everything has been taken away.,被动语态,被动语态常用在以下情况：,2. 当我们不必要提出动作的执行者时。 e.g. I was born in 1960. 3. 当我们强调或侧重动作的承受者时。 e.g. She is liked by everyone. (强调she) 4. 当我们出于礼貌避免说出动作的执行者时。 e.g. Youll be contacted.,5. 当我们出于行文的需要时。 e.g. The film was directed by Xie Jin. 3. 有些动词习惯上常用被动语态。 e.g. He is said

12、to be a good teacher.,定义：现在完成时表示到目前为止已经完成，并对现在留下某种后果和影响的动作。,现在完成时,have / has + 动词的过去分词,如: already, yet, ever, never, just, before, once, twice 等连用, 也可以和包括现在在内的时间状语, 如these days, today, this year, so far 等连用。 e.g. We have seen that film before.,1. 表示过去发生的某一动作对现在造成的影响或结果,常与一些时间状语。,2. 表示过去发生的动作或存在的状态,一

13、直持续到现在,也许还将继续下去,可以和表示从过去某一时刻延续到现在的一段时间的状语连用。 1) 即for +时间段, since+时间点/从句, in the last ten years等, 谓语只可用延续性动词。 e.g. He has lived here since 2005.,2) has / have been to 去过某地表示某人的一种经历,可与once, twice, already, ever, never等连用。 e.g. I have been to New York once. have/has gone to 去某地了,说话时某人已离开此地,在去某地的途中或已在某地

14、。 e.g. He has gone to Shanghai.,have / has been in 逗留在某地 (已经一段时间)。 常和for ten days, since I came here等连用。 e.g. He has been in London for half a month.,1) Where is Jim? He _ Wuhan. 2) My parents _ the Great Wall twice. They like there very much. 3) _ you ever _ to the Happy valley? 4) How long _ Peter

15、 _ the West Hill farm?,have been to,Have,been to,has,been in,has gone to,即学即练,5) My sister _ the shop. She will be back in two hours. 6) She _ Shanghai. She isnt here. 7) She _ Shanghai. She is here. 8) She _ Shanghai for two years.,has gone to,has gone to,has been to,has been in,3. already - yet 已经

16、 用于肯定句,用于否定句, 疑问句,1. She has not seen this film _. She has _ seen this film. 2. I have _ combed my hair. Have you combed your hair _. 3. He has _ watched a video. He has not watched a video _.,already,already,already,yet,yet,yet,4. 现在完成时中延续性动词和非延续性动词,英语动词根据词义可分为两种,一种是延续性的,一种是非延续性的, 终止性动词(也可称为瞬间动词, 或

17、点动词),如:become, begin, buy, borrow, arrive, die, finish, get to know, go, join, marry, start, stop等。,表示动作的发生与结束于一瞬间完成,不能再延续, 所以它的现在完成时不能和表示延续的时间状语连用,即不能与表示一段时间的状语, for+时间段, since+时间点/从句连用,也不能用在how long引导的特殊疑问句。,中常见非延续性动词有: leave, go, come, arrive, begin, buy, borrow, die, join, become 等。 非延续性动词要表示持续时

18、, 可用以下方法： 将时间状语改为时间段 + ago, 句中谓语动词用一般过去时。 e.g. My brother joined the army two years ago.我弟弟参军两年了。, 若保留for + 时间段, since+时间点/从句, 或用在 how long句型中, 则需将终止性动词改为相应的状态动词或延续性动词。,come / go / arrive / get / reach / move - be in/at open - be open die - be dead close - be closed become -be borrow - keep put on -

19、 wear buy - have,常见终止性动词与延续性动词 (或状态动词) 的对应关系如下:,leave - be away (from) begin / start - be on fall asleep - be asleep end/finish - be over catch a cold - have a cold,join the army - be in the army be a soldier join the Party - be in the Party be a Party member,吉姆买了这只钢笔两年了。 Jim bought this pen two yea

20、rs ago. Jim has had this pen for two years. Jim has had this pen since two years ago. It is two years since Jim bought this pen. It has been two years since Jim bought this pen.,现在完成时和一般过去时的区别： 现在完成时所表明的是过去发生的动作对现在的影响, 强调的是现在的情况, 不可以和表示过去的时间状语。 yesterday, in 1991, three days ago last time, last nigh

21、t等连用。 一般过去时表明的是过去发生的事实, 和现在不发生关系。,e.g. He has lived in Beijing for 8 years. (A)He lived in Beijing for 8 years. (B) 他在北京住了8年。 (A)句讲的是到目前为止他在北京住了8年，可能还会继续在北京住下去。 (B)句讲的是他在北京住过8年，现在不在北京了。,1. Its a long time since we _ (meet) last time, isnt it? 2. -I know you _ (choose) a picture book among these. -Ye

22、s,Have a look at it, please. 3. So far, spaceships without people _ (reach) the moon and some other parts of the universe.,met,have chosen,have reached,Exercises,4. My father _ home for nearly three weeks. A. has gone away from B. has left C. has been away from D. went away,5. Mr and Mrs Green have

23、_ in China for a week. A. been B. got C. arrived D. reached,近义句转换： 1. Jack joined the League five months ago. Jack _ a League member five months ago. 2. Its a long time since we met last. We _ _ each other for a long time since we met last time.,has been,havent,seen,Fill in the blanks with the right forms of the given words. 1. Every day my mother _(get) up early. 2. The dinosaur eggs _ (discover) many years ago by scientists. 3. Listen! Some children