1、英语：Unit5The power of nature教案（6）（新人教版选修6）The third period Language PointsExplain language points in the reading passage.1. have you ever considered how weak humans are compared with a volcano, hurricane or earthquake ? 你是否想过， 和火山，飓风或地震相比人类是何等脆弱。consider 思考, 主要用于： consider +名词/-ing形式: He is consideri
2、ng studying abroad.他正在考虑出国留学。Consider + wh-: We considered how we should help them.我们仔细考虑应该如何帮助他们。Consider + 副词：Consider carefully before you decide.要慎重考虑后再作决定。2. Do you enjoy taking risks ? risk n. 风险，危险： he was taking a risk by overtaking on a bend. 他在转弯处超车是在冒险。 The house is a fire risk. 这房子有起火的危险
3、短语联想：at risk 在危险中:You are at risk if you dont wear a seat belt. 不系安全带真的会有危险。at the risk of 冒危险：At the risk of seeming rude, I must refused your request, Im afraid. 尽管似乎无理，恐怕我还是必须拒绝你的要求。3.Many houses have been covered with lava or burnt to the ground. 许多房屋被熔岩覆盖或烧毁。 burn to the ground 指楼等被烧毁。例如： He ha
4、s no place to live in because his house has been burnt to the ground. 他无处栖身因为他的房子被烧掉了。短语联想：burn away 烧掉：The wood had burnt away to nothing. 木头已烧成灰烬。burn down (建筑物) 烧毁：The cinema burnt down last year.电影院去年被烧毁了。The school was burnt down by vandals.学校被人纵火烧毁了。Burn off 烧掉：He was badly injured in the acci
5、dent, and his hair was burnt off. 他在事故中严重受伤，头发也被烧掉了。Burn out 烧坏:The engine had burnt out. 引擎给烧坏了。Burn up 烧毁，燃得更亮/旺： The rocket burnt up when it reentered the earths atmosphere. 火箭重入地球大气层时烧毁。 He put more wood in the fire to make it burn up. 他往火上加木材想让他烧的更 旺。4. We slowly made our way to the edge of the
6、 crater. 我们慢慢向走火山口的边缘。 make ones way （向某地）走（去）：She hesitated, but made her way forward. 她犹豫了一下，但向前走去。She hastily left the room, and made her way to her bed. 他迅速离开房间，朝她床边走去。短语比较：make ones way 还表示“有出息” ：If you want to make your way in the world, you must learn to work hard while you are still young. 你
7、若想要有出息，趁年轻的时候要学会发奋。make way (for) 让路，让位：All the traffic has to make way for a fire engine. 所有的车辆都得给救火车让道。I shall make way for a younger man .我将把职位让给更年轻的人。5. Today , I am just as enthusiastic about my job as the day I first started. 如今， 我和开始从事这项工作时一样满怀热情。 enthusiastic (about) 感兴趣的，热心的： She seemed ent
8、husiastic about the idea. 她好像对这个主意很感兴趣。 We got an enthusiastic response from our customers. 我们得到了顾客们的热情反应。6. She made an effort to be nice to her boss.她努力对老板好些。 effort 可用做不可数名词，表“力气”： It took a lot effort to lift the boxes. 抬起那些箱子要花很大的力气。effort 可用做可数名词，表“费劲的事” “尝试”： It was an effort to get up this m
9、orning.今天早晨起床很费劲。 Despite all our efforts, we failed. 尽管我们尽了力，我们还是失败了。make an effort to do sth 努力做某事： He made an effort to arrive on time. 他尽量准时到达。Homework: finish exercises in “learning about language”The forth period GrammarReview the usage of ing form:1.Write the following pairs of sentences(or o
10、ther similar ones)on the board.I was feeling tired. I went to bed earlyfeeling tired I went to bed earlyI worked hard all day. I went to bed earlyHaving worked hard all day, I went to bed early.1. Ask student to consider when the action in each pair of sentences happened and Lead them to understand
11、that in the first pair of sentences, the feeling and the action are happening at the same time; whereas in the second pair, the working allday happened before he/she was tired3.Examine the sentences below and discuss in what way the structures similar to each other and in what way they are different
12、Looking carefully at the ground, I made my way to the edge of the crater.Having experienced quite a few earthquakes in Hawaii already, I didnt take much notice.Having + past participle (the perfect ing form) to refer to an action that took place before the time expressed by main verb.4. Read and dis
13、cuss Exercise 1 in the SB5. Set Exercise 2. check answers and discuss structures.6. Set Exercise 3,4 and 5. check answers after each exercise and discuss reasons for the structures used.7. 小结-ing 形式的用法1) ing 形式作状语用法例句时间Walking along the street, I met Mary. (= While I was walking along the street.)在街
14、上走的时候，我遇到了玛丽。条件Turning to the left, you will find the school. (= If you turn to the left, .)向左走，你就会找到那个学校让步Knowing where I live, he never come to see me .(= Though he knows where Ilive, .)尽管他知道我的住处，但从不来看我。伴随I stood there, waiting for her. (= , and waited for her.)我站在那儿等她原因Being tired , I stopped to
15、take a rest. (= Because I was tired, .)因为疲倦，我停下来休息。结果It rained heavily, causing severe flooding in the area.(= It rained heavily so that it caused severe flooding in the area.)在这个地方雨下的如此大，以至引发了洪灾。2) ing形式的完成式 (Having been)+p.p. , 主语+谓语被动主动Having finished my work, I went home. (= After I had finished
16、 my work, .)工作做完只后，我就回家了。例句u ing形式的完成式所表示的时间在谓语动词之前u 表示被动可直接用过却分词用法Having +p.p. , 主语+谓语句型 . 使用-ing形式需注意的几个问题:.分词(短语)作状语时，其逻辑主语必须与句子的主语一致。如果不一致，必须用独立主格结构来表示，也就是在分词前面加上它的逻辑主语。 My wife had a long talk with Sally, explaining why she didnt want the children to play together我妻子与莎莉谈了很长时间，解释她为什么不想让孩子们在一起玩。(
17、现在分词explaining是句子主语my wife做的动作，它们之间是主动关系,即explaining的逻辑主语，就是句子的主语my wife 。)The train having gone, we had to wait another day.（the train逻辑主语 + having gone 既为独立主格结构）分词短语做状语时，前面可以加上连词或 介词，但是分词短语和句子之间不能用并列连词(如but，and)，因为并列连词接的是两个并列成分，而分词短语只是全句的一个状语部分。分词和主句之间可用逗号。例如:误: Having been told many times，but he
18、still couldnt understand it.正: He was told many times, but he still couldnt understand it.或Having been told many times， he still couldnt understand it.-ing的一般式和完成式现在分词都可以表示先后接连发生的动作。在可能引起误解的场合应该用完成式现在分词表示先发生的动作。例如:Opening the drawer，he took out his wallet. (=He opened the drawer and took out his wal
19、let.)他打开抽屉，拿出钱包。Coming into the room，he put down his bag. (=he came into the room and put down his bag.)他走进房间，放下提包。Having brushed his teeth，Mr. Brown came downstairs for breakfast.布朗先生刷过牙，就下楼来吃早饭。 (此句如写成:Brushing his teeth, Mr. Brown came downstairs for breakfast.可能指“边刷牙，边下楼。分词的否定形式是在分词短语前面加上 not, never等否定词构成。例如: Not fearing the fire, the child touched and got a finger burnt. 小孩儿不知道怕火，用手去摸，把手指烫了。 Not knowing how to find the subway, I asked a policeman for help. 我不知道怎 样找到地铁，就去找警察帮忙。
