Lesson25教学案

Lesson25教学案
知识目标：
A. Vocabulary:（词汇）
science experiment prove observe cardboard fill …with cover ….with, turn upside down inside outside
B. Sentence Patterns （句子）
1.1 ' m sure the floor won ' t get wet.
2. I ' m not euk* think the floor will get wet.
3. Maybe you should do this experiment outside.
能力目标：
How to to talk about certainty and uncertainty.
情感目标：
Arouse the students ' inteinesioing science experiment
二.重点、难点分析
1. experiment是一个兼类词。

n.实验，试验；v.做实验
We often do experiments in our science class.我们在自然科学课上经常做
实验。

Look! Some boys are doing an experiment in the room.
瞧!几个男孩正在房间里做实验。

Can you experiment with the VCD player?尔能试一下这台影碟机吗？
2. fill …wit用... 把.... （容器）装满，意同put sth. into sth.把..... 装
到……（容器）里。

Jack filled his backpack with books.
Jack put the books into his backpack 杰克把书装进了书包。

Fill in the blanks with the given words.用所给的单词填空。

The girl is filled with joy （fear）.这个女孩内心充满了喜悦（恐惧）。

3. cover…with用.... 把 ... 盖上，表示动作。

（1）cover n.圭寸面，盖子v.覆盖
David broke the cover of his book.大卫把他的书皮撕破了。

Please cover the jar with a cover 请用盖子把瓶子盖上。

(2) be covered with被... 覆盖，覆盖着，表示状态。

The ground is covered with snow地面被大雪覆盖了。

4. a piece of cardboard^ 张纸板
piece用来表示不可数名词的量，块、件、条、片等。

a piece of music一段音乐 a piece of son厂首歌a piece of cloth—块
布 a piece of news^ 贝U消息
在表示事物量的时候，piece可以根据实际情况用单数或复数，而名词则只能用单数。

two pieces of chalk两枝粉笔five pieces of paper 5长纸
Please pass me a piece of paper# 递给我一张纸。

Tom was hungry, he ate two more pieces of bread.
汤姆饿了，他又吃了两片面包。

5. upside down 颠倒
Don t turn the box upside down不要把箱子弄颠倒了。

The jar is upside down.广口瓶倒放着。

反义词：right side up正放，向上
The jar is right side up.广口瓶正放着。

6. sure确定，确信，务必。

下面总结一下其具体用法：
(1)(美语)用于口语交际，当然，理应如此
—Are you going?你去吗？
—Sure!当然去！
—Can you give me your hand你能帮我一下吗？
—Sure!当然可以！
(2)be sure of sth.相信，确信某事
I ' m sure of what he sai我对他所说的确信无疑。

Are you sure of it?尔相信那件事吗？
(3)be sure to do sth.一定，务必。

用于口语。

Be sure to get to school on tim»定按时到校。

Be sure not to touch that machine一定不要动那台机器。

(4)be sure+ that 从句
He is sure that he can succeed他确信他能成功。

(5) make sure+从句，相信，确信
I make sure that he would go there.我确信他会去那儿的。

7. keep保管，保存，使... 保持，保守，饲养等。

How long may I keep the book?这本书我可以保存多久？
Keep the seer© Don ' t tell anyone elSS保守秘密。

不要告诉别人。

Uncle Wang keeps a group of sheep王伯伯养了一群羊。

(keep 饲养) keep sth. (sb. )+形容词/介词，让某人/物保持某种状态。

Please keep the room clean 请保持室内清洁。

The cardboard can keep the water in.纸板能把水控制在里面。

keep on doing sth.继续或反复做某事(= go on doing sth.)
The man was tired, but he kept on working.那个人累了，但他仍坚持工作。

随堂练习：
一.Fill in the blanks with the right words
and the first letter is given.
1. Let' s do an e ____________
2. Brian has one t __________ and
Danny has another.
3. They can p ______ who' s right.
4. I turn the jar u ________ down.
5. Please o ________ carefully.
二.Listen and answer
1. Why does Danny say they should do this experiment outside?
2. What' s Brain ' s theory?
三•写出相应的短语或词
1. 用……把……装满 ________________
2. ......... 用 .. 把 ____________________ 盖住
3. 我（不）确信…… _________________
4. 正面朝上 _______________
5. 把……翻转 _________________________________
6. ________________ g et wet ___________________
7.do an experime
8. _______________________________ a piece of cardboard
9.inside （反义词） _______ 10.theory （复数） _____
ll.careful 副词） _________ 11.science 形容词） _____
同义句转换。

1. The rooms are full ofthe students now.
The rooms _____ _____ _____ the students now.
2. My pocket is filled with the money.
My pocket _____ _____ _____ the money.
选择。

1. Can you _____ the box________ books?
A fill ,with
B full ,with
C filled ,with
D full , in
2. The child ____ all the bowls ______ water.
A fill,with
B fills, with
C is full ,with
D is filled ,with
3. People wear clothes ■ w arm.
A. keep
B. keeps
C. to keep
D. keeping
4. The room is full of _______
A. light
B. lighted
C. lights
D. /
5. Kate is very ________ . She is doing her homework very _______
A. careful ; careful
B. carefully ; carefully
C. carefully ; careful
D. careful ; carefully 6. May I your pen? I want to write a letter it. A. use ： use B. use in C. with ； in D. use ； with 7. They
plant trees next week.
A. shall
B. would
C. going to
D. will
8. He was very when he heard the news.
A. surprise
B. surprised
C. surprising
D. surprised at
9. There is going to a football match.
A. is B be C. have D. hold。