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句型转换之肯定句变否定句教学设计

2018-03-31 23:07阅读:
句型转换之肯定句变否定句教学设计
教学目标:帮助学生更好的了解句型,并掌握肯定句变否定句的方法。
教学重难点:让学生掌握肯定句变否定句的方法及特殊情况。
教学过程:
一、导入:我是一名英语老师。Im a English teacher.老师指着一位学生说:他不是一名英语老师。He is not a English teacher.这两个句子有什么不同呢?
二、了解什么是肯定句和否定句?
三、肯定句变否定句的方法
1、先归类:1)含“be动词和情态动词”型,直接在be动词或情态动词后加not,其它照抄不变。
be动词包括:am, is, are, was, were(过去式).
常见的情态动词有:can, could, would, will, may等等。
归纳方法:一找(be),二加(not),三照抄
例句:
1)I am a student.→I am not a student.
2)She is a girl.→She is not/isn't a girl.
3)He can speak English.→He can not/can't speak English.
2)没有be,含“实意
动词”型,转换否定句时,即在实意动词前借助动词否定形式don't,doesn'tdidn't,然后把句中的实意动词变回原形。
归纳方法:一借(don't,doesn'tdidn't),二还原动词原形)
三照抄
注意:在一般现在时中,当主语是第一、二人称或复数时,加don't来否定;当主语是第三人称或单数时,加doesn't来否定;在一般过去时中,一律用didn't来否定。
例句:(1)I like apples.→I don't like apples.
2)He likes apples.→He doesn't like apples.
3)特殊情况:
当遇到some 变 any; 遇到too/also变either; 遇到and 变 or; 遇到always 变 never。
例句:1.There are some boys in the classroom.
There aren't any boys in the classroom.
2.Lucy can sing and dance.
Lucy can't sing or dance.
四、相关练习(注意:做题的口诀步骤)
1. Ms White is a teacher, too.
Ms White ______ a teacher ,_______.
2. He often goes to school at eight.
He often ______ _____ to school at eight.
3. I would like some chicken.
I ______like ______ chicken.
五、课堂检测
1.She is kind and friendly.
2. He goes to bed at nine.
3.She can dance.
4. I often plays football after school.
5. I like apples and oranges.

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