选修六unit4知识点。教学文稿

U4(选修六)

1.depend on/ upon+ n 依靠,依赖, 确(坚)信

You can’t depend on your parents forever.

depend on/upon+sb.+to do 指望某人做……

You can’t depend on him to come on time.

depend on/upon +it +that…. 指望…..

You may depend on it that he will come.

depend on/upon +wh-从句

Whether you can pass the exam depends on how hard you work.

That (all) depends./ it all depends. (口语)视情况而定，

I may help you. But that/ it depends.

2.light

1)n. 光,线,灯

2)v.照亮,点燃-----lit(lighted）-----lit(lighted）

He lit a match. 他划着了一根火柴。

A smile of triumph lit up her face. 她的脸上闪耀着胜利的微笑。

The match lights easily. 这火柴容易划着

3)adj .

The suitcase is very light.（轻的）

There was a light rain falling. （蒙蒙细雨）·heavy rain/rain cats and dogs倾盆大雨He is a light sleeper. 他睡不沉。（易醒的）

3.

heat v. / heat up 是某物变热或变暖

heated adj. 热的激烈的

heated debate, heated discussion

heatedly adv.愤怒地激昂地

heater加热器发热器

4.consume v.---- consumer (n.).

1 消耗,花费;耗尽

She consumed most of her time in reading.

2吃完,喝光The kids soon consumed all the food on the table. 孩子们一会儿功夫便把桌上的食品全部吃光。

3 使全神贯注,使着迷+with The boy was consumed with curiosity. 那男孩充满好奇心。

5.as … as one can = as … as possible

Please come here as soon as possible.= Please come here as soon as you can..

as many as 多达

as long as 长达,只要

as far as远至,就…而论

as well as 和…一样好,也,和

as early as 早在

6.对比：

Our food supply has given out.

His money soon ran out.

We are running out of our time.

I have run out of my oil.

All his savings have been used up.

7.Trap vt. 陷入/ n. 陷阱圈套

They finally trapped the mouse in a cage.最后，他们用笼子把老鼠逮着了。

The police set a trap for the thieves.

She was trapped in the burning house.

8.keep ….from….远离..

stop…. (from)….停止..

prevent…(from)….阻止...

You should clean your room to keep it from getting dirty.你应该打扫房间以保持干净。

Keep doing 继续

keep out 挡住使进不去

keep up with 跟上

9 What do you think green house gases do?你认为温室气体有什么作用呢?

▲本句中think后接了一个由what引导的宾语从句。

但应注意的是：特殊宾语从句即当一般疑问句主句的谓语动词是think, believe，suppose，consider, imagine，guess 和suggest 等时，表疑问的词要放在主句前即句首。例如：[正] Who do you think will win in the game?

[误] Do you think who will win in the game?

当然一般情况下宾语从句的疑问词应放在主句之后，例如：

[正] Do you know why we can't cut down the big tree?

[误] Why do you know we can't cut down the big tree?

when compared to other natural changes是一个省略的时间状语从句，其完整的形式应该是When it is compared to…;

在时间、地点、条件、方式或让步状语从句中，如果从句和主句为同一主语，或者从句的主语是it,而且从句中的谓语动词时动词be或含有助动词be，可省略主语和be 如：

If (it is) so, you must get back and get it. Although (he was) criticized, he still worked hard.

He hurt his legs badly when (he was) playing football

pare

compare to/ with: 与…相比

Compared to/with many women, she was indeed very fortunate.

compared to most natural changes 与大多数的自然变化相比

compare A with B：相比（不同）

If you compare her work with his, you will find hers is much better.

compare A to B：把A比作B

A teacher's work is often compared to a candle.

People often compare teachers to gardeners. 人们经常把老师比做园丁。

The poet compares his lover to a rose in his poem.

e about:发生=happen(无被动）

1 .This situation should never have come out.

2 .How did it come about that he had his leg hurt?他的腿伤着了，这是怎么发生的？

3 .This has not come about overnight.冰冻三尺，非一日之寒

Take place事件的发生有某种原因或事先的安排：The Olympic Games of 2008 took place in Beijing.

Happen 偶然或突发性事件：what happened to you?

I happened to see him on my way home= It happened that I saw him on my way home.

Occur 发生或想到，突然想起，意为发生时=happen: what has occurred?

I occurred to me that she didn’t know I had moved into the new house.

Come about 事情发生了，但还不知道为什么。常用于否定和疑问

When mother woke up, she didn’t know what had come about.

Break out 常指战争灾难疾病争吵事件的发生

拓展：

come into being 形成

Come into power/office 当权/当职