八年级英语下册Lesson27教材内容详解冀教版.doc

Lesson 27: Danny the “Dry-O-Saur”!丹尼，一只“干恐龙”！◆课文英汉对照Danny, Jenny and Brian stand in front of the class. Everyone laughs. Danny is wearing his swimsuit!丹尼，詹妮和布莱恩站在同学们面前每个人都笑了丹尼穿着泳衣！“Okay,everyone!” says Jenny.“We are going to show you an intering experiment.”“各位注意了！”詹妮说 “我们将给你们展示一个有趣的实验 ”Danny sits down. Brian puts water into the jar. He puts the cardboard on top of the jar. He puts 丹尼坐了下来布莱恩把水装到瓶子里 他把纸盖在瓶口上 他把手his handon the cardboard and turns the jar upside down. Then he holds the jar above Danny’s head.按在纸板上并且将瓶子倒了过来。

然后把瓶子举到丹尼的头顶上方图片译文：Are you ready, Danny? 丹尼，准备好了吗？I guess so. 我想是的Next, Brian will take his hand off the cardboard, ” says Jenny.“接下来，布莱恩把手从纸板上拿开 ”詹妮说Now you know why I’m wearing my swimsuit,” says Danny.“现在你们明白我为什么穿着泳衣了吧， ”丹尼说Danny’s theory is that he will now get wet,” says Jenny. “ Is the right, class?”“丹尼的观点是他现在将被弄湿， ”詹妮说 “同学们，他是对的吗？”“Yes, I think so !” says one student.“是的，我想会是这样！”一个学生说道No, I don’t think so!” says Brian.“不，我认为不是这样！”布莱恩说Brian takes away his hand. Brian is right!布莱恩拿开了他的手。

布莱恩是对的！“Are you surprised, class?” asks Jenny.“同学们，你们感到吃惊吗？”詹妮问Examine the jar and the cardboard. We have discovered that cardboard can hold the water in. “检查一下瓶子和纸板 我们发现纸板可以将水保持在里面 What are your conclusions? Why didn’t Danny get wet?”你们的结论是什么？ 为什么丹尼没有被弄湿？“Maybe you used glue!” says one student.“可能是你用了胶水！”一个学生说No, that’s not it!” The air pushes up on the cardboard,” explains Brian. “It’s like water “没有，不是那么回事！空气对纸板向上施加压力， ”布莱恩解释说 “就像水向上托举pushing up on a boat. The force is strong enough to hold the water.”着船一样。

空气的力量中以能托住水 ”“Air is stronger than I thought!” says Danny.“空气比我想象的有力量！”丹尼说Weird Mud 神奇的泥巴In this experiment, you make something that’s sometimes a liquid and sometimes a solid. 在这个实验中，你会配制出一种有时是液体，有时是固体的东西What do you need ? 你需要准备什么？● a bowl 一只碗 ● a spoon 一个汤匙 ● cornstarch 玉米淀粉 ● water 水What do you do ? 你需要做什么？1. Put eight apoonfuls of cornstarch into the bowl. 在碗里放 8 汤匙玉米淀粉2. Add four to five spoonfuls of water. 加四到五汤匙水3. Mix the cornstarch and water together. 把玉米淀粉和水搅拌在一起。

4. Pour the mud into your hand. 把玉米糊倒在你手里5. Open and close your hand. 反复张开并紧握你的手What is happening? 发生着什么？Some things dissolve in water. Sugar dissolves in water. Salt dissolves in water. But not cornstarch. It only mixex 有些东西能溶解到水里 糖能溶解到水里 盐能溶解到水里 但玉米淀粉不能它只能和水with water. When you close your hand and press, some of the water gets out. The mud becomes 混合在一起 当你合上手并攥紧的时候，有些水流出来 玉米糊变成了固体 solid. When you open your hand, the water mixes in again. Now it is liquid!当你张开手的时候， 水又和玉米糊混合在一起。

此时，它又成了一种液体What else can you do? 你还能做什么？Put some of the mud in a bowl. Now hit the mud with your open hand. What happens? Now 取一些泥巴放进碗里 现在用你的手拍打泥巴 会发生什么？ 现在你do the same thing with water. Are the mud and water the same when you hit them?再用手掌拍击水面当你拍击它们的时候，泥巴和水发生的现象一样吗？●教材内容全解1. Danny, Jenny and Brian stand in front of the class. 丹尼、詹妮和布莱恩站在同学们面前短语：in front of 为固定搭配，意为“在……的前面” ，指外部的前面●—There’s a big apple tree in front of my house. 在我家房子前面有一棵大苹果树●—Li Ming sits in front of Danny. 李明坐在丹尼的前面。

知识拓展：in the front of in the front of 意为“在……（内部）的前面 ”●The driver sits in the front of the bus. 司机坐在公共汽车的前面●Tom is sitting in the front of the classroom. 汤姆正坐在教室的前面经典考题：认真选一选①I couldn’t read the notice on the board because many people were standing_____.A. in the front of B. the front of C. in front of D. in the front of 解析：句意为“我看不见木板上的布告因为很多人站在前面” the front of 指“外部前面” ；inthe front of 指“内部前面” 在人的前面应该是外面的前面，故应用 the front of答案：A②Mr.Li is standing _____ the boat.A. in front B. in front of C. in the front of D. in front of 解析：句意为“李老师站在小船的前面” 。

李老师所站的地方属于小船的内部，指的是小船的前面，故用 in the front of答案：C⑵语法：在此句中，Danny, Jenny ，Brian 是并列主语，当主语用 and 连接时，其谓语动词用第二人称的形式，故用 stand 而不是 stands⑶class 在此意为“同学们” 2. We going to show you an interesting experiment. 我们将给你们展示一个有趣的实验⑴show 是一个多义词，其词性和意思总结如下：①show v. 意为“给……看”●—Please show me your tickets. = Please show your tickets to me.请把你的票拿出来②show v. 意为“指引”●—Can you show me the way to the post office? 你能指给我去邮局的路吗？③show v. 意为 “教，演示” 在做此意讲时，其后可以跟双宾语，即 show sb. sth. 类似的还有 give sb. sth.;pass sb. sth. ; buy sb. sth. ; teach sb. sth. 等。

●—Let me show you how to surf (swim / do it). 让我教给你如何冲浪（游泳 /做那件事） ④show v. 意为“说明，显示”●—The drawing shows how the machine work. 这张图说明了机器如何运转的⑤show n. 意为“展览”●—There will be a flowers show next week. 下周将有一场巨花卉展览⑥on show 意为“展出”●—Some old things are on show. 有些古董正在展出⑦show n. 意为“表演” 我们汉语中耳熟能详的“……秀”即为“show”的音译例如：作秀，时装秀，旗袍秀等等●—They will hold a modern clothes show. 他们将举办一次现代时装表演⑵interesting 形容词，意为“有趣的” ，修饰名词时，名词后置但是如果修饰代词 somet-hing, anything 时，形容词要后置⑶ an experiment 意为“一个实验” ，注意 experiment 前面的冠词是 an 不是 a3. Are you ready, Danny? 你准备好了吗，丹尼？ready 为形容词，常作表语，一般不作定语。

●—Everone is ready now. Let’s go. 现在大家都准备好了，我们走吧●—we were ready to start at nine. 我们做好了准备九点开始知识拓展：① be / get ready (for) 意为“ （为……）准备好” ●I need about half an h。