2．主语是第一人称和第三人称时，用“Let’s …”或“Let him / her…”
(1) Let’s go out for a walk, shall we? 我们出去散步，好吗？
(2) —Let’s play football. 我们去踢球吧。
—Good idea. 好主意。
3．用“Why not…?”来提出建议，表示“何不……？”not后面接动词原形。Why not…?实际上是Why don’t we / you…?的简略形式。不能说Why don’t do …或why not doing…。
（1）Why not go and see Uncle Wang now?为什么现在不去看望王叔叔？
（2）Why not wear your new trousers? 为什么不穿上你的新裤子？
（3）Why not go swimming? 为什么不去游泳？
I don’t think it is good for animals to stay at zoo. 我认为动物带在动物园没有好处。
这是一个含宾语从句的主从复合句。I don’t think 是主句，it is…为从句。
此句形式上否定了动词think，但是实际是否定了他后面的定语从句。英语中，think，believe 等动词后如果是否定的，应将否定转移到think，believe等动词上。这被称为动词的否定转移。如：I don’ t think your can get home so early.
另外，“It is +形容词+for sb. to do sth.”意为“对于某人来说做某事是……”如：
It’s easy for us to swim. 对我们来说游泳很容易。
I don’t think it is good for animals to stay in cages. 我认为对于动物来说呆在笼子里是没有益处的。
I have a lot of homework to do.我有很多家庭作业要做。
home work to do译为要做的家庭作业。动词不定式做定语放在所修饰的名词之后，例如my mother has a lot of home work to do every day .（我的妈妈每天有很多家务活要做）
听力教学建议
Lesson 20听力与图片的结合使用
（1）学生用书P98的6种动物可扫描彩图；
（2）可将教参P49的听力原文扩展一下，如：
It s got a mouse like small head. It can jump on its two back legs.
Sometimes cars have to be very careful in places where there are so many of this kind of animal. If one of them hit a car, there will be a very bad accident.
It is said that the bird put its head in the sand or earth when its enemy comes. That is its way out not to face the reality.
Its hometown is in China but it s famous all over the world.
It moves quietly without making any noise. Its blood is cold and sleeps a long sleep in winter.
It looks like a cat but much larger and stronger than a cat. It s black and yellow in colour. It s got a very large head with a black mark on its forehead like the Chinese character " Wang". It sometimes even help men when they have fallen into the sea and are about to die.
日常交际分析：提建议
本单元的核心话题是“提建议”。主要通过对话和句型训练方式来实现的。在要单元一开始的对话中就将表示建议的3种方式的句型都呈现给学生。如：Shall we go to the zoo? Why not meet a little earlier? Let’s make it half past nine。本单元从一开始建议到动物园去玩，直到最后建议周六到中山公园去玩，都是围绕着主题。这有助于完成主题教学，使本单元的重点句型得到很好的训练。
第17课的对话中出现了许多有关提建议的句子，教师可以让学生熟读此段对话，就能掌握其中部分提建议的句型。
第19课以找对子的方式又加强了提建议的句型练习。第二部分的练习将不同的建议的句型放在一起编成对话，以达到复习及熟练的目的。
第20课在设置语音和听力训练之后，再转入到本单元的主题上：如何提建议，如何在动物园里欣赏各种动物。最后的短文提示创设了情景，让学生自己编写对话。
教学设计方案
Lesson 17
Period: The First Period
Content: Lesson seventeen
Properties: Tape recorder, some pictures of animals
Teaching Objectives: Students should grasp
1. the dialogue ( esp. the telephone conversation)
2. some animal names
Language Focus:
1. Telephone conversation
A: May I speak to sb? /Is sb. in?
B: (This is sb) speaking. Hold on, please/ Sorry, she (he) isn’t in. Shall I take a message? /Who’s that speaking?
A: (This is) sb speaking.
2. Useful expressions
What’s up? － What’s the matter?
3. Ways of making a suggestion.
① Why not … ?
eg. Why not have a rest now?
② Let’s …?
eg. Let’s go out for a walk.
③Shall we…?
eg. Shall we have a new year party?
Teaching Procedures:
I. Organizing the class
Greeting and a duty report
II. Revision
1. Say what John is going to do (after school, at college, after college)
2. Recite the rhyme “good, better, best”
Ⅲ. Presentation
Teacher: (Write the title “Shall we go to the zoo?” on the blackboard) Have you ever been to the zoo?
Students: Yes.
T: What can you see in a zoo?
S: …
Have you ever seen these animals? Show the pictures and teach the words “panda”, an animal eating the bamboo, “lion” the famous movie is called King Lion, “elephant the biggest animal living on land, “monkey” something like human beings, “tiger” a very dangerous animal and has the name of “King of the beasts” “dolphin”, “deer”, “snake”, “rabbit”, “duck”, Beijing has a specialty “Beijing Duck” very delicious, “fox” a very clever (cunning) animal, “bear”. And more animals for them to see, “crocodile”, “Kangaroo” “camel” “flamingo” “zebra” etc. Students recognize the animals by their English names and read the words.
IV. Practice
(Students look at the color page and discuss the questions in pairs. Point out that the word “friendly” is from “friend” it means to act like a friend. )
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