新沪教牛津版九年级下册英语 Unit 4 3- Grammar 教案

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Unit 4 Natural disasters
课题: Unit 4 Natural disasters
课时: 第 3 课时，共 4 课时
课型: Grammar
教学目标:
知识目标
1.Master the usage of “it”.
2.Master the usage of it used as empty subject.
e it to make sentences.
能力目标
To improve the ability of using the grammar to make sentences.
To grasp the grammar.
情感目标
To use it in different situations.
教学重点: Work out the rules of “it”
教学难点: The rules of “it”
教学步骤:
Step1: Lead-in
Enable students to do a guessing game.
(Show practice to ask the Ss to finish. 展示练习，让学生了解it的基本用法)。

Step2: Presentation
1.it的用法（1）:在表示时间、季节、天气、温度或距离的表达方式里，我们用 it 作形式主语。

此时，it无实际意义但不可以省略。

1）. Help students to work out the rule.（用实例引导）
2）. Show the practice and ask students to do it.（巩固练习）
2. it的用法（2）:当句子的主语是动词不定式短语时，动词不定式短语一般不放在句首，而通常用it来作为句子的开头，动词不定式短语则放在句末。

注意：
1）“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。

2）It 作为形式主语还常见于It seems / appears that… 的句型中。

Further practice.
Work in pairs.
Explain the task to students and check the students’ achievement.
Which group is the best?
Encourage students to show their work.（通过用it组织句子同时结合说，写的练习锻炼学生的能力）
Step3. Practice in class
it的用法综合练习。

Step4: Homework
1.Grasp the grammar.
2.Do the practice in this unit again.
3.Make some sentences with “it”.
4.Team work.
Make a conversation about the emergency.
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