课件45张PPT。 The Study of Living ThingsLesson 28 Look into Science Unit 5课文呈现知识讲解…………Lesson 28
The Study of Living? Things词汇
听写课堂导入课文1结对活动课堂小结课后作业… 同学们，上一课学习的单词你们都掌握了吗？现在大家来检验一下，点击下面的音频开始听写吧！Do you like nature, why?THINK ABOUT IT·Would you like to be a biologist when you grow
up？Why or why not?
·What mysteries of nature do you know about? Dr. Chip Taylor teaches biology at a university in the United States. He studies one kind of North American butterfly. Just like a migrating bird，this butterfly travels about 4 000 kilometres south in fall. Fantastic facts about the butterfly have been drawing Dr. Taylor’s attention?. In Mexico，the butterflies always return to the same small piece of forest，which is only 20 kilometres wide?. Here, as many as? 230 million butterflies spend the winter. They can cover some trees almost? completely. The butterflies that return to the south are the great-great grandchildren of the butterflies that left for the north. When they begin to travel north in spring，the females lay eggs. They lay eggs on only one plant：milkweed.Butterflies are beautiful. What do you know
about them? But in Mexico，people cut down? the trees that the butterflies need to rest on because they want more land for farming. In the United States and Canada，farmers use chemicals that kill milkweed. This worries? Dr. Taylor a lot.
Now things are improving. Mexico has begun to protect parts of its forests. The United States and Canada have encouraged farmers to use less chemicals. Scientists still don’t understand how the butterflies know when to fly south. If they are even a few days late，they will freeze. And how do all the great-great grandchildren find the same forest in Mexico every year? This is both puzzling and? interesting for many scientists.
There are many mysteries yet to be discovered by those interested in science. Would you like to study biology?living/'l?v??/ adj.活着的 eg：All the living people were taken to
safety.
所有活着的人都被带到了安全的地方。知识点1考向【易错点】辨析 alive，living与live draw one’s attention 引起某人的注意 拓展pay attention to 注意知识点2eg：It’s a special day to draw people's attention
to the environment.
它是个引起人们注意环境的特殊日子。eg：Pay attention to your handwriting.
注意你的书写。典例昨天，他不同寻常的讲话吸引了我们的注意。
His unusual speech ________ ________ ________yesterday. drew our
attention 20 kilometres wide 20千米宽 考向知识点3表示长、宽、高等用“基数词＋单位词(metre，foot，inch等)＋形容词(long，wide，high等)”或者用“基数词＋单位词＋in＋名词(length，width，height等)”。
eg：The wall is 20 metres long and 2 metres high.
＝ The wall is 20 metres in length and 2 metres in
height. 这堵墙20米长，2米高。典例这座建筑30米高。
The building is ________ ________ ________. 【点拨】“基数词＋单位词(metre，foot，inch等)＋
形容词(long，wide，high等)”可用来表示长、宽、高。 30 metres high as many as意为“多达……，和……一
样多”，修饰可数名词复数。 知识点4eg：There are as many as ten thousand birds in the
forest. 这个森林里有多达一万只的鸟。 as…as…和……一样。中间用形容词或副词的原级。否定形式中，前面的as也可用so, 即not so/ as…as意为“不如……”。
eg：I think English is as important as Chinese.
我认为英语和汉语一样重要。
You aren’t as/ so tall as your brother.
你没有你弟弟高。 考向典例Steve isn’t as ________ as Kelly. He often makes mistakes in his writing. (浙江丽水)
A．careless B．tidy
C．careful D．difficult【点拨】根据句意可知，Steve不如Kelly仔细，他经常在
书写方面犯错误。as…as 中间应该用形容词或副词的原
级。 故选C。C almost/'??lm??st/ adv.几乎，差不多 考向知识点5eg：I almost missed my train.我差点错过了火车。辨析 almost与nearly almost和nearly这两个词都表示“几乎”，“差不多”的意思，在不少场合可以互换使用，但有以下区别：典例用almost或nearly的适当形式填空。
1．There was ________ no snow that winter.
2．We are ________________ there.
3．The speaker said ________ nothing that
was worth listening to.
4．________________ all the students left here a few minutes ago.almost nearly/almost almost Almost/Nearly cut down 砍倒，缩减 知识点6eg：They cut down the big tree.
他们把这棵大树砍倒了。
You’d better cut the article down to about 500
words.
你最好把这篇文章压缩到五百字左右。与cut有关的短语有：
cut in 打断(谈话)，插嘴
eg：Don’t cut in when others are talking.
当别人正在讲话时不要插嘴。
I was just coming to that point when you cut in.
我刚要谈那一点，你就打断我了。
cut off 切断，断绝
eg：The flood cut the villagers off from the rest of
the world.洪水切断了村民与外界的联系。 考向 He cut off a branch from the tree.
他从树上砍下了一根树枝。
cut out 删除，停止做(或使用、食用)
eg：I’ve been advised to cut sugar out of my diet.
有人劝我饮食要忌糖。
I cut out one paragraph in this article.
我删除了这篇文章的一个段落。 典例政府告知我们不要砍倒这些树。
The government has told us ______ ________ ________ ________the trees.【点拨】cut down砍倒，tell sb. not to do sth.告诉某人不要做某事。 to cut down not worry /'w?ri/ n.烦恼，忧虑v.担心，担忧 考向一知识点7eg：Don’t worry. I know how it turned out.
不要担心。我知道事情怎样发展。worry作及物动词，构成结构：worry sb. 使某人担心。
eg：I didn’t want to worry my friend.
我不想使我的朋友担心。 考向二worry作不及物动词，常构成：Don’t worry. “不要担心。”；worry about sth./sb. “担心某事/某人”。
eg：Don’t worry. He’ll be all right.
别担心。他会平安无事的。
The child has nothing to worry about.
这个孩子没有什么可担心的。 考向三worried adj. 担心的
be worried about sb./sth. 担心某人/某事
eg：Don’t be worried about me. I can look after
myself. 不用担心我。我能照顾自己。 both…and… ……和……都 考向知识点8both...and, neither...nor与either...or 的区别。
both...and...表示“……和……都”，是指两者兼而有之，连接两个并列成分作主语时，谓语动词要用复数形式。neither...nor表示“既不……也不”，指两者都不，连接两个并列成分作主语时，谓语动词跟最邻近的主语保持人称和数上的一致。
either...or 表示“或者……或者”或“不是……就是”的意思，是指两者中的一个，它连接两个并列成分作主语时，谓语动词跟最邻近的主语保持人称和数上的一致。典例1.You can take ________ this pen ________
that pen, but you can’t take both.
2．________Lily ________ Tom will come
this afternoon, because they are very busy.
3．She has learned English and Chinese for
years，so she can speak ________English
________ Chinese very well.eitherNeitherbothor norand1.Read the lesson and complete the table. return spend lay Let's Do It !
find rest kill
2.Join the sentences to make attributive clauses.
Example：
We did some experiments yesterday.
The experiments were fantastic.
The experiments that we did yesterday were fantastic.Let's Do It !
1．I asked him to mail the letter. I wrote the letter to my cousin.
___________________________________________________
2．Yesterday I met a boy. The boy is a new member in our art club.
_________________________________________________
3．Mary was carrying ?a bag. The bag cost her a lot of money.
_________________________________________________
4．Football is a team sport. Football is popular all over the world.
_________________________________________________I asked him to mail the letter that I wrote to my cousin. Yesterday I met a boy who is a new member in our art club. Mary was carrying a bag which cost her a lot of money. Football which is popular all over the world is a team sport. carry/'k?ri/ v.携带，搬运知识点9eg：Let me carry the box for you.
让我替你搬这个箱子吧。
She carried her baby in her arms.
她怀里抱着她的宝宝。用图片表示bring，take与fetch的区别为：拓展 I asked Lily to fetch me an English book，but she brought me a Chinese book，so I asked her to take it to the teacher’s office.
我让莉莉去给我取一本英语书，她却给我拿来了一本语文书，于是我让她把它拿到老师的办公室。魔法记忆
3.Work in groups of three to play a game.
Task tips：Each group should prepare some pieces of paper and divide them into three columns. Student A writes a person’s name in the first column，folds the paper and passes it to Student B．Student B writes a statement beginning with “who”，folds the paper and passes it to Student C．Student C must finish the sentence and read it out loud.
Example：
Mr. Brown who is a biologist will give us a talkLet's Do It ! 本节课主要学习了以下重点内容:
（1）重点单词：living, almost, worry, carry等。
（2）重点短语：draw one’s attention, 20
kilometres wide, as many as, cut down,
both…and…等。一、根据句意及汉语提示完成单词
1．Do you like ________ (生物学) at school?
2．Look! There are many___________ (蝴蝶) among the
flowers.
3．This is a ________ (极好的) film.
4．I ___________ (完全地) forgot about it.
5．Many people ________ (迁移) to Canada in the 1800s.biology butterflies fantastic completelymigrated 二、单项选择
6．Our teacher often encourages him ________ hard.
A．work B．working
C．to work D．works
7．Since environment is too important to all of us, we human
beings had better ________ fewer trees.
A．turned down B．cut down
C．put down D．cut upCB8．Look! My dog is ________ on the ground in the sun.
A．lie B．lay
C．laid D．lying
9．(呼和浩特)The photo ________ taken by my brother
last week is very nice.
A．which were B．that is
C．that were D. which was
10．(中考·上海)The volunteer spoke as________ as she
could to make the visitors understand her.
A．clearly B．more clearly
C．most clearly D．the most clearlyDDA三、用方框中所给单词或短语的正确形式填空11．If you ____________the trees，you will
harm the environment here.
12．The interesting story ________________.We
all liked it.drew our attention cut down13．The fact of this thing is ________ for scientists.
14．They ____________their own country.
15．The ________ butterflies lay eggs in spring.returned to female puzzling 1.熟记本课时的词汇
2.完成本课时的课后作业
