八年级英语travelling教案1

Unit 2 Travelling

一、教学内容：

Unit 2 Travelling

Grammar

二、教学目标：

掌握Unit2的词法结构和用法：

1. so…that /such…that/enough to/too…to…

2. have/has been in, have/has been to, have/has gone to

3. 延续性与短暂性动词

经典讲解

Grammar 1:so…that /such…that/enough to/too…to…

解释：如此……以至于……

so+ adj. /adv. +that从句或such+单/复数名词+that从句

例：

It’s so hot in summer that we can’t do without the air conditioner.

夏天的天气热的我们少不了空调。

The teacher spoke so fast that I couldn’t understand what he was saying.

老师讲得太快以致于我听不懂他在说什么。

He is such a genius that he does n’t have to study much for exams.

他是个天才，所以他考试都不用怎么念书。

They are such good basketball players that everybody wants to watch their games.

他们个个都是很棒的篮球员，所以每个人都想去看他们打球。

表示：足以做某事enough to… 如: He is old enough to do it.

意思是太……而不能too...to… 例: He is too young to go to school.

中考链接

so…that, too…to和enough to都是初中英语教材中的重要结构，在一定条件下它们可以相互转换，并经常成为中考考查的热点之一。先请看下面两道中考试题：

1. He is old enough to go to school.

He is __________ __________ that __________ __________ go to school.

2. She was so weak that she couldn’t t ake care of her baby.

She was __________ weak __________ take care of her baby.

（答案：1. so old; he can 2. too; to）

那么在什么情况下三者可以相互转换呢？

（一）so…that与too…to的转换

当that引导的从句为否定式且从句主语与主句的主语相同时，so…that可转换为too…to 结构；若从句主语与主句的主语不相同时，so…that可转换为too…for sb. to结构。例如：Th e box is so heavy that he can’t carry it. ＝The box is too heavy for him to carry.

（二）so…that与enough to的转换

1. 当that引导的从句为肯定式时，若从句主语与主句主语相同时，so…that可转换为enough to结构；若从句主语与主句主语不相同时，so…that可转换为enough for sb. to结构。例如：

Xiao Lin is so old that he can go to school. ＝Xiao Lin is old enough to go to school.

The box is so light that he can carry it. ＝The box is light enough for him to carry.

2. 当that引导的从句为否定式时，若从句主语与主句主语相同时，so…that可转换为enough to的否定结构；若从句主语与主句主语不相同时，so…that可转换为enough for sb. to 的否定结构。同时要注意，转换后的形容词（副词）要用其相应的反义词。例如：The man is so old that he can’t go to work. ＝The man isn’t young enough to go to work.

The desk is so heavy that I can’t move it. ＝The desk isn’t light enough for me to move.

（三）enough to的句式为否定式时，enough to可以转换为too…to结构。

转换后的too…to结构中的形容词（副词）要用其相应的反义词。例如：

He is not old enough to do the work. ＝He is too young to do the work.

The problem is too difficult for me to work out. ＝The problem isn’t easy enough for me to work out.

【典型例题】

一、改写同义句。

1. The book is interesting enough for everybody to read.

The book is ____ interesting ____ everybody likes to read it.

2. The boy is so short that he can’t reach the buttons of the lift.

The boy is ____ short ____ ____ the buttons of the lift.

The boy isn’t ___ ____ _____ _____ the buttons of the lift.

3. He is such a young boy that he can’t go to school.

He is _____ young ______ he can’t go to school.

He is_____ old _____ to go to school.

He is _____ young _____ go to school.

4. He is so old that he can go out alone.

He is _____ ________ ______ go out alone.

5. Mr. Wu is so patient that he spends much time explaining things to us.