unit 7 lesson 2 词语用法

Lesson 2词语用法

“污染”pollute

[寓词于境]　　

阅读下列句子，注意pollute的用法。

I feel it is our duty not to pollute our environment. 　　

A lot of rivers have been polluted.　　

[用法归纳] pollute vt.弄脏，污染

[拓展]　　

pollutionn. [U]污染（物）

pollutern.污染源；污染者

[即学即练]将下列句子翻译成英语。

1.骑自行车是很好的运动；而且还不污染空气。

2.那些人正在清除海滩上所有的污染物。

Key:　　

1. Riding bikes is good exercise; moreover, it does not pollute the air.　　

2. The men were clearing all the pollution off the beach.　　

“禁止”ban　　

[寓词于境] 　　

阅读下列句子，注意ban的不同意思和词性。

Canadawill ban smoking in all offices later this year. 　　

Swimming is banned in this river.　　

The general also ended a ban on political parties.　　

[用法归纳] ban vt.禁止，取缔; n.禁止，禁令

[拓展]　　

ban sb. from doing sth.禁止某人做某事

[温馨提示] ban的分词形式要双写n。

[即学即练]将下列短语翻译成中文。

1. ban drugs2. a parking ban3. a total ban on nuclear arms　　

Key:　　

1.禁止吸毒2.禁止停车3.核武器的全面禁止

“上演”present　　

[寓词于境]　　

阅读下列句子，注意present的不同意思和词性。

They presented 15 lively songs and dances. 　　

The experts will present their findings at the yearly meeting of the Radiological Society.　　

May I present a suggestion?

Allow me to present Mr. Brown to you.　　

Every member of the club was present.　　

I’m going to buy Mother a present for her birthday.　　

He is at present away on his holidays.　　

[用法归纳]　　

presentvt.上演，演出；讲演，演示；提出；正式介绍

adj.在场的；出席的

n.礼物，赠品；现在，目前

[拓展] at present目前；for the present暂时

[温馨提示] 　　

present作定语时要后置。如：

Those present were all Chinese.　　

[即学即练]将下列句子翻译成英语。

1.最后，她的思路转到了现在。

2.全家人都已经到场了。

3.我们向委员会提交了三个方案供讨论。

Key:　　

1. Finally, her thoughts switched to the present.　　

2. The whole family has been present.　　

3. We presented three plans to the committee for discussion.