It’s not easy to learn a foreign language well. 学好一门外语不容易。
It is necessary to make a plan for this course of study．必须制定一个学习这门课程的计划。
It’s better to give than to receive. 奉献总比索取好。
如果要说明不定式表示的动作是谁做的，可以在不定式前加一个for 引起的短语：
It is not hard for one to do a bit of good. 对于一个人来说做点好事并不难。
在以某些形容词（如: kind ,good ,nice ,clever, wrong, right ,foolish, wise, unwise等）作表语时，不定式前常可加一个of引起的短语，来说明不定式指的是谁的情况，如：
It’s kind of you to think so much of us. 你总是想着我们真是太好了。
例句：
To make a mistake is human. 犯错误是人之常情。
It’s better to be the safe side. 万无一失更好。
To speak well ……/ ill of everyone……说人好（坏）话……
To work hard is the key to success. 勤奋学习是成功的钥匙。
Lesson 57 教学设计示例
Properties: Recorder, Overhead Projector
Teaching Objectives:
1. Understand the dialogue.
2. Learn some useful structures and phrases.
3. Learn the grammar: the Infinitive.
Language focus: like being a… , play with, a lot of fun
Teaching Procedures:
I. Showing the teaching aims
II. Revision
Revise the names of animals that could be kept as pets: dog, cat, snake, parrot, rabbit, fish, etc. Ask Does anyone have a pet? wWhat kinds of animals would you like to have as pets?
III. Leading in
Ask: What do you want to be when you grow up? Let the students discuss the question. Then give the second question: What do you want to be, a doctor for humans or a doctor for animals? Why?
IV. Presentation
Look at the picture in Lesson 57. The boy is sitting on the sofa. His father is talking with a dog in his hand. What did they say? Play the tape for the students to listen, check the answers with the students. Then read the dialogue and answer the questions of Exercise 1 in the workbook in pairs. Go through the dialogue and explain some language points.
Play the tape for the students to listen and repeat, ask the students to practise. Then let them act out the dialogue in pairs.
VI. Free practice
《A doctor for animals(第5页)》出自：www.89xue.com网www.89xue.com
Do an example with one student. Then let the class make up their own dialogues in pairs. Get them to act out their dialogues. Ask the students to discuss the questions. Ask:
Do you think it's more important to help people than animals? Why?
What kinds of jobs do you know?
What would you like to be in the future?
What are your parents' job?
Do your parents like their job? Why or why not?
VI. Presentation
Ask the students to find the Infinitive sentences. 1. To be a doctor for animals is very rewarding. 2. To help animals is helping people. Ask the students to pay attention to the Infinitive. Give them more examples to understand better. Then go through Part 3. Choose the possible answer. Let the students master this form:
It is adj . + to do something / To do something is + adj .
VII. Workbook
Do Exercise 3 in class. Let the students translate the sentences into Chinese.
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