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1、Period Starting out & Understanding ideas课前自学导引黑脉斑蝶的旅程许多动物在一年中的某些特定时期从一个地方迁移到另一个地方。这种每年一次的活动叫作迁徙。他们迁徙的目的是寻找食物，寻找伴侣，或者寻找更温暖的天气。北美的黑脉斑蝶的迁徙是大自然中最令人惊奇的迁徙之一。每年秋天，数以百万计的这些美丽的昆虫，有着精致的黑色和橙色翅膀，开始了漫长而艰难的旅程。不知怎么地，它们成功地向南行进了4,000公里，到达了加利福尼亚或墨西哥。然而，直到最近才有人知道它们是如何做到这一点的。由华盛顿大学的Eli Schlizerman教授领导的一组科学家现在已经找到了答案。他
2、们发现黑脉斑蝶能分辨出白天的时间。它用眼睛测量太阳的位置。这两条信息白天的时间和太阳在天空中的位置使得蝴蝶决定它走的路。最终，它成功到达了它过冬的地方。解决黑脉斑蝶神奇能力之谜的办法出现在它陷入严重困境的时候。在过去的几年里，其数量锐减了90%。不幸的是，人类活动是黑脉斑蝶数量下降的主要原因。在许多可以找到黑脉斑蝶的地方，人们正在破坏着自然环境。他们砍伐树木，使用化学物质杀死黑脉斑蝶幼虫吃的植物。然而，对黑脉斑蝶行为的研究带来了对这种生物更多的认识。人们一直在共同努力记录它的迁徙情况，确保它有足够的植物食用。如果这项工作奏效，黑脉斑蝶数量可能会再次增加。我们对这种美丽的生物了解得越多，它生存的
3、可能性就越大，并且可以在未来很长一段时间内保持其在自然界中的地位。课堂合作探究1seek v. 寻找，寻求(P50)归纳拓展seek to do sth. 设法做某事seek (for) sth. 寻找/谋求某物seek after 追求；寻求seek out 找出；搜出I am always seeking to improve my teaching method.我一直在设法改进我的教学方法。He sought out his friend in the crowd.他在人群中找到了他的朋友。He is a man who likes seeking after wealth and p
4、ower.他是一个喜欢追求财富和权力的人。(1)单句语法填空Seeking too much fame made him unpopular.Now a number of college graduates are seeking (get) a highpaid job.答案：afterto get(2)单句写作很多人年复一年地寻求心灵的平静，却很难如愿以偿。Many people spend years ， often with little success.答案：seeking for peace of mind2measure v. 量，测量；评估linking verb 有长/宽n
5、. 尺寸；措施(P50)归纳拓展(1)measure . by . 用来衡量(2)make . to ones measure按某人的尺寸做(衣服等)(3)take measures to do sth.采取措施做某事名师点津measure作“尺寸”讲时，常用作不可数名词；而作“措施”讲时，通常用复数形式；作动词表示“有长/宽/高”时，为连系动词，不用于被动语态和进行时，如果此意义的短语作后置定语，要用现在分词的形式。Either measure the temperature with a bath thermometer or test the water with your wrist.
6、要么用浴用温度计测量水温，要么用手腕试一下。The house is more than twenty metres long and measures six metres in width.这座房子长20多米，宽6米。Youth is not measured by age but mood. 年轻不是用年龄来衡量的，而是一种心境。My mother made me a pair of trousers to my measure.我妈妈按照我的尺寸给我做了一条裤子。单句语法填空Education shouldnt (measure) only by examination results
7、.The government has taken measures (bring) down the high prices of house.In the old days, my mother always made new clothes my own measure with the Spring Festival coming.The new bridge under construction, (measure) twice as long as the old one, will be completed next month.答案：be measuredto bringtom
8、easuring3position n. 位置；处境，状况；地位；职位；姿势(P50)归纳拓展in a(n) . position 处于地位/位置in/out of position 在/不在恰当的位置hold the position of . 担任的职务take up (ones) position就位Where would be the best position for the lights？这些灯装在什么位置最好？Hes going to be in a very difficult position indeed if things go badly for him.如果事情进展不
9、顺利的话，他的处境将非常艰难。Money, fame and social position are of no interest to him. 他对金钱、名誉和社会地位都不动心。He held a senior position in a large company.他在一家大公司担任高级职位。One of the cups is out of position. Put it back in position.有只杯子位置不对，把它放回到适当的位置。名师点津当position作先行词后接定语从句且关系词在从句中作状语时，用关系副词where引导定语从句。(1)写出position在句子中
10、的含义Can you find our position on this map？ My husband has a good position in a government office. Make sure that you are working in a comfortable position. What would you do if in my position？ 答案：位置职位姿势状况，处境(2)单句语法填空This problem put him a difficult position.Sales director is a position communication
11、ability is just as important as sales.答案：inwhere4determine v. 测定，确定；决定，决心(P50)归纳拓展(1)determine to do sth. 决心做某事(表动作)determine on/upon (doing) sth.决定(做)某事(2)determined adj. 坚决的，有决心的，果断的be determined to do sth. 决心做某事(表状态)(3)determination n. 决心，决定We determined to fulfill the task.我们决心完成任务。I have determ
12、ined on/upon setting up my own business after graduation.我已决定毕业后创业。My teachers talk woke me up, and I was determined to study harder.老师的话唤醒了我，我决定更加努力地学习。(1)单句语法填空She is determined (carry) on with her education.She gave me a (determine) look which said she wouldnt change her mind.Now that you have ex
13、pressed your (determine), you should act.I have determined going to the countryside after graduation.答案：to carrydetermineddeterminationon/upon(2)句式升级He is determined to get ahead of others in studies, so he works day and night.(分词作状语) in studies, he works day and night.答案：Determined to get ahead of
14、others5amazing adj. 惊人的，了不起的(P51)归纳拓展(1)amaze vt. 使吃惊(2)amazed adj. 感到惊奇的；吃惊的be amazed to do . 对做某事感到惊奇be amazed at/by 对很惊奇(3)amazement n. 惊讶(much) to ones amazement 令某人(非常)惊讶的是in amazement 惊讶地She was amazed at how calm she felt after the accident.她惊奇地发现事故发生后她如此镇静。I was amazed to see how much she had changed.看到她巨大的变化我感到惊讶。To my amazement, you have never heard of Michael Jackson.令我惊讶的是你竟然从来没有听说过迈克尔杰克逊。He looked at me in amazement, and it seemed that he hadnt recognized me.他惊讶地看着我，好像没有认出我来似的。名师点津amazing指“令
