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(共13张PPT)
lesson28：The Study of Living Things
冀教版九年级英语
Would you like to be a biologist when you grow up Why or why not
What mysteries of nature do you know about
1. Read the lesson and complete the table.
· The butterflies always __________ to the same small piece of forest and ______ the winter there.
· The butterflies that return to the south are great great grandchildren of the butterflies that left for the north.
· The females ____ eggs on only one plant: milkweed.
· How do the butterflies know when to fly south
· How do the great-great grandchildren of the
butterflies ____ the same forest
2. Join the sentences to make attributive clauses.
We did some experiments yesterday. The experiments were fantastic.
The experiments that we did yesterday were fantastic.
I asked him to mail the letter. I wrote the letter to my cousin.
I asked him to mail the letter which / that / 不填 I wrote to my cousin.
Yesterday I met a boy. The boy is a new member in our art club.
Yesterday I met a boy who / that is a new member in our art club.
1. Fantastic facts about the butterfly have been drawing Dr. Taylor’s attention.
这种令人着迷的蝴蝶一直吸引着泰勒博士的注意。
have been doing是现在完成进行时，“一直在做某事”，表示过去某时开始的某个动作或状态一直延续到现在，且还在进行。常表示动作的延续性、重复性及感彩等。
e.g. Mr. Smith has been living in London since 1995.
史密斯先生自从1995年以来一直住在伦敦。 （延续性）
Have you been meeting her recently
你最近常见到她吗？（重复性）
Who’s been eating my apples
谁吃了我的苹果？（感彩)
draw one’s attention“吸引某人注意力”。
e.g. He tries to draw our attention to the painting.
他试图把我们的注意力吸引到这幅画上
2. Here, as many as 230 million butterflies spend the winter.
在这里，多达两亿三千万只蝴蝶在这里过冬。
as…as “和……一样”，
表示同级比较。基本结构为as+ adj. / adv. + as。
e.g. English words can be as short as one letter.
英语单词可以短到只有一个字母。
This film is as interesting as that one.
这部电影和那部电影一样有趣。
Your pen writes as smoothly as time.
你的钢笔书写起来和我的一样流畅。
其否定形式为not as / so + adj. + as。
e.g. This dictionary is not as / so useful as you think.
这本词典不如你想象的有用。
注意：as … as 结构中，使用形容词或副词的原形。as … as 结构用于肯定句或否定句，so … as只用于否定句中。
3. The butterflies that return to the south are the great great grandchildren of the butterflies that left for the north.
这些飞回南方的蝴蝶是春天飞往北方蝴蝶的曾曾子孙。
that return to the south 和that left for the north都是定语 从句。
leave for “到，去；出发，前往”。
e.g. They will leave Beijing for Guangzhou tomorrow.
他们明天要离开北京去广州。
They left for Shanghai yesterday.
他们昨天去上海了。
现在完成进行时表示动作从过去某一时间开始，一直延续到现在还未结束。现在完成进行时有时也可用来表示经常的、反复的动作。
(1) 结构：have / has + been + V-ing
(2) 与since或for引导的时间状语连用；since后接动作开始的时间，for后面接一段时间；对since或for引导的时间状语提问时要用how long 。
(3) 否定形式是在have / has后加not构成，可缩写为haven’t / hasn’t
(4) 一般疑问句形式是将have / has提至主语前；肯定回答用“Yes, 主语+have / has.”，否定回答用“No, 主语 +haven’t / hasn’t.”
e.g. a. -How long have you been drawing
-I have been drawing for two hours.
b. -How long has Maria been playing the piano
-She has been playing the piano
since she was five years old.
Research and write a report about an animal or insect that you think is fantastic. Include a drawing or image of the animal or insect.

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