《Birdwatching》PPT课件(第3课时)

牛津译林版八年级英语上册《Birdwatching》PPT课件(第3课时)，共17页。

B What do birdwatchers do?

B1) Match the words on the left with the meanings on the right. 

1 provide (line 3)           ______   a stop something from happening

2 perfect (line 3)            ______   b know

3 lead to (line 10)          ______   c a person who is travelling or visiting a place

4 prevent (line 13)         ______   d give something to someone or something else

5 tourist (line 17)           ______   e the best

6 understand (line 19)   ______   f have something as a result

知识点

in order to  “以便，为的是”

in order to后跟动词原形，引导目的状语，可以放在句首或句中。

eg：In order to catch the early bus, he got up early this morning.

＝ He got up early this morning in order to catch the early bus.

为了赶上早班车，他今天早晨起得很早。

in order to do sth.的否定形式为in order not to do sth.，意为“为了不做某事”。

eg：In order not to miss the chance, he gave up his holiday. 

为了不错过这个机会，他放弃了自己的假期。

less and less 越来越少

less and less 后跟不可数名词， 如：less and less money

fewer and fewer 越来越少，后面跟可数名词， 如：fewer and fewer books

more and more越来越多，既可以跟可数名词，也可以跟不可数名词， 如：more and more people/ time

prevent /prɪ’vent/ vt.防止，预防

eg: Nothing can prevent her going to school.

什么也不能阻止她上学。

prevent sb. from doing sth.意为“阻止某人做某事”。prevent还可用stop或keep替换。

eg: The heavy rain prevented (stopped/kept) us from going forward.   大雨阻止了我们前行。

课堂练习

一、用方框中的单词或短语的适当形式填空

1．His hard work ____________ his success.

2．The workers are very busy _______________．

3．These years, _______________ people understand that it’s necessary to save wild animals.

4．This is a ________ of road accidents.

5．Some students are playing in the playground, ________ some students are doing their homework in the classroom.

二、根据汉语完成句子

6. 熬夜会导致健康问题。

Staying up late will ________ ________health problems.

7. 你最好尽快阻止你儿子玩火。

You’d better ____________your son_______ _______ ________fire as soon as possible.

8．我们的报告将会使更多的人理解保护鸟类的重要性。

Our report will make more people __________ ______ ____________ _______ __________ ________.

9. 这个森林为野生动物提供了完美的庇护所。

This forest _______ _______ _______ ________wildlife.

10．为了找到足够的食物，很多鸟儿飞到这里作短暂停留。

________ ________ ________find enough food, many birds fly here _______ _______ _______ _______．

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