初中英语Unit 4 Natural disasters优秀ppt课件

导入新课

Read and think:

Read and pay attention to the red words.

Think and share.

Let students get ready for the lesson.

新课讲授

Step1. Lead in

Read and pay attention to the red words.

Step2. Presentation

Using it as the empty subject

We can use it as the empty subject like this:

It is one o'clock.

It is summer now.

It rained all day.

It is only a five-minute walk from my home to the school.

It is hot in this room.

it 作形式主语的用法:

代词it可以用来代替一个名词、一个短语、一个句子，在句中作主语或宾语。

it作主语指时间、日期、天气、距离和气温等。此时，it无实际意义但不可以省略。

We often use it to refer to the time, season, weather, distance and temperature.

It作形式主语代替动词不定式。

We can also use it as the empty subject of a sentence to replace a to-infinitive.

“It + is + 形容词 + for + 宾语 + to do sth.” 句型

通常与表示可能性、必要性、重要性、紧迫性、频繁程度以及价值判断等的形容词连用。

It作形式主语代替动词不定式，常用于以下句型中：

It is/was adj. (of/for) sb. to do sth.

当表语是与事物的特征有关的形容词时，

如easy, difficult, hard, important, necessary等，用介词for.

It is/was adj. (of/for) sb. to do sth.

当表语是描述人的性格、品质的形容词时，

如kind, nice, polite, clever, foolish, stupid等，用介词of.

it takes/took sb. some time to do sth.

it is/was n. to do sth.

We can also use it as the empty subject in the following sentence pattern: It seems/appears that ...

It seems/appears that nobody is paying any attention to the flood.

it作形式主语还常用于句型 “it seems/appears that +从句”，表示 “似乎/好像/看来......”

Step3. Pair work

Talk about the usage of using it as the empty subject in pairs.

Give some examples for each usage.

Step4. Game time

Step5. Summary

Using it as the empty subject:

We often use it to refer to the time, season, weather, distance and temperature.

We can also us it as the empty subject of a sentence to replace a to-infinitive.

We can also us it as the empty subject in the following sentence pattern: It seems /appears that …

Step6. Exercise

用it, that, one 填空。

1. The water in the cup is hotter than ________ in the pot.

2. ________ is interesting for Lucy to play badminton.

3. I have lost my pen. I think I must buy ________.

4. —Who is knocking at the door?

—________ must be Lily. We planned to go shopping together.

5. ________ is great to have a party here.

单项选择

1. The twins are so alike that even their father finds ________ hard to tell them from each other.

A.it     B.him      C. them

2. Mount Xiaolei is not far away from here, but it will still take us a few hours ________ there by bike.

A. getting  B. to get

C. get   D. got

3. I have a few books on Chinese food. You can borrow ______ if you want.

A. one   B. it    C. much     D. a little

4.Excuse me，where is Xingguang Theatre ？

— Go along this road to the end，and you’ll find ______ on your left.

A. it     B. any    C. one

Step7. Homework

1. Review the usage of using it as the empty subject.

2. Review the usage of using it as empty subject of a sentence to replace a to-infinitive.

3. Review the usage of using it as empty subject in the sentence pattern: It seems/appears that …

Read the sentences and learn the usage of using it as empty subject.

Learn and remember the rules of the adverbial clauses of purpose.

Finish the tasks.

Review the usage of using it as the empty subject.

Summarize the grammar we’ve learnt in this lesson.

Finish the exercises.

Complete the homework.

Let students get ready to learn   the usage of using it as empty subject.

Learn and remember the rules of the adverbial clauses of purpose.

Consolidate the usage of using it as the empty subject.

Review the usage of using it as the empty subject.

Summarize the grammar we’ve learnt in this lesson.

Consolidate the grammar points we’ve learnt in this lesson.

Consolidate the knowledge after class.

课堂小结

In this class, we learned the usage of using it as the empty subject; learned the usage of using it as the empty subject of a sentence to replace a to-infinitive and the usage of using it as the empty subject in the sentence pattern: It seems/appears that ….

Summarize the grammar in this lesson.

Summarize the usage of the grammar.

板书

Module 2  Environmental problems

Unit4 Natural disasters

Period 3 Grammar

Grammar:

Using it as the empty subject:

We often use it to refer to the time, season, weather, distance and temperature.

We can also us it as the empty subject of a sentence to replace a to-infinitive.

We can also us it as the empty subject in the following sentence pattern: It seems /appears that …

Visualize the key points of the lesson.