人教版选修6 Unit4 Global warming

Language points

Teaching material

NSEFC Book 6 -- Unit 4

Teaching Aims

1. To learn some new words and phrases.

2. To learn some complicated sentence patterns.

Teaching Important Point

How to help the students to master the usage of some useful words, expressions and sentences.

Teaching Difficult Point

How to enable the students to grasp and remember the detailed information of the reading material.

Teaching Procedure

Teaching aids

A projector, and a blackboard

Step 1 Revision

1. Retell the text.

Step 2 Language points

T: Now let's learn some language points of the text.

Slide show

1. It is a rapid increase compared to most natural changes.

1．compare vt. 比较；对照。如：

Compare your answers with those at the back of the book to see if they are right.

把你的答案同书后面的答案对照一下，看看是否正确。

My handwriting can not be compared with my father's.

我的书法不能与我父亲的相比。

vt. 喻为；比拟。如：

Man's life is often compared do a candle.

人生常被比为蜡烛。

Shakespeare compared the world to a stage.

莎士比亚把人世比做舞台。

compare...with...表示"把......与......相比（同类相比）"

compare...to... 表示"把......比做......（异类相比，比喻）"

compared to /with 与......相比, 只能作状语

2. How has this come about and does it matter?

come about : 发生，造成 相当于happen

When Mother woke up, she didn't know what had come about.

I'll never understand how it came about that you were late three times a week.

Do you know how the air accident came about?

3. There is no doubt that....

一、作不可数名词,作"疑惑;怀疑"

①肯定句中doubt多接whether (一般不用if代替) 同位语从句。如:

There's some doubt whether he'll keep his promise. 他会不会信守诺言还难说。

She had her doubts whether the new book would sell well. 她怀疑新书是否会畅销。