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Unit 2 Saving the Earth

Topic 1 Pollution has caused too many problems.

Section A（1a-2）

Ⅰ.Teaching aims

Knowledge aims：

Master the key words and phrases, consolidate the usage and differences between Simple Past ＆ Present Perfect。

Describe the changes by using Simple Past ＆ Present Perfect。

Use “there be sth./sb. doing sth”correctly。

Skill aims:

Understand the dialogue about environment, tell the usage between Simple Past ＆ Present Perfect。

Master and use Simple Past ＆ Present Perfect to listen, say, read and write.

Emotional aims:

Let the students to know the importance of protecting environment.

Ⅱ. The key points and difficult points

1. Key points:

Words and phrases:

bee, butterfly, mess, shame, several, pollute, waste, villager, destroy, cut down, pour,

see sb./sth. do sth., see sb./sth. doing sth., cut down

Sentences: What a shame! / What a mess!

The flowers and grass have gone!

What has happened here?

There be sth./sb. doing sth.

There are several factories pouring waste water into the stream.

Everything has changed.

Grammar: differences between Simple Past and Present Perfect tense.

Difficult points：

Use “there be sth./sb. doing sth.” correctly..

Tell the differences between Simple Past and Present Perfect tense

Ⅲ. Learning strategies

1.Help the students form the habit of predicting the listening materials by reading 1b before listening.

2.Lead the students to imitate the dialogue and make up the new conversations by reading1a 内容过长，仅展示头部和尾部部分文字预览，全文请查看图片预览。 s.

Section A



Words and phrase:

bee, butterfly, several, pollute waste, villager, destroy,

cut down, see …doing sth.,

pour…. into…

Sentences:

What a shame! / What a mess!

The flowers and grass have gone!

There are several factories pouring waste water into the stream.

Everything has changed.





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