2021-10-26

1.dangerous adj. 不安全的；有危险的

be in danger 处于危险中

out of danger 脱离危险

【例句】

Alice was badly ill yesterday,but now she is out of danger.

The earth will be in great danger （dangerous）if humans go on to pollute our cities.

in （介词）great（形容词）后+名词，介词后有动词也要变成动名词。

【例句】

To see more blue skies in our city, we shouldn't pollute the air.

为了看到更多的蓝天，我们不能污染空气。

2. pollute v.污染；弄脏

polluted adj.受污染的

pollution n.污染；污染物

【例句】

The environment is not clean because there is too much pollution（pollute）.

pollute “e”不发音，去e 加ion变名词

too much 太多后加名词

I think something must be done to prevent people from polluting the river.

我想必须阻止人们污染这条河流。

prevent sb. from doing

3.environment n.环境

environment -friendly 环保的

【例句】

This car is environment friendly ,because it causes very little pollution.

这个车是环保的，因为它污染小

environment friendly 作表语中间不加“-”。