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1、Unit 4 Unit 4 3.Then I m too tired to do well. 然后就很累然后就很累, 考不好。考不好。 too to 意为意为“太太而不能而不能”, 出现在简出现在简 单句中,常与单句中,常与so that 句式、句式、not enough to do句式进行转换。句式进行转换。e.g. He is too young to go to school. =He is so young that he cant go to school. =He is not old enough to go to school. 他太小而不能上学。他太小而不能上学。 1. He
2、 is old enough to go to school. He is _ _ that _ _ go to school. 2. She was so weak that she couldnt take care of her baby. She was _ weak _ take care of her baby. 那么在什么情况下三者可以相互转换呢?so oldhe can too to A. sothat与tooto的转换 1. 当当that引导的从句为否定式引导的从句为否定式,且从句主语与且从句主语与主句的主语相同时,主句的主语相同时,sothat可转换为可转换为tooto结构
3、;结构; 2. 若从句主语与主句的主语不相同时,若从句主语与主句的主语不相同时,sothat可转换为可转换为toofor sb to结构。例如:结构。例如: She is so young that she cant go to school. She is too young to go to school.The box is so heavy that he cant carry it. The box is too heavy for him to carry.B. sothat与enough to的转换 一、当一、当that引导的从句为肯定式时,引导的从句为肯定式时, 1.若从句主语
4、与主句主语相同时,若从句主语与主句主语相同时,sothat可可转换为转换为enough to结构结构; Xiao Lin is so old that he can go to school. Xiao Lin is old enough to go to school. 2. 若从句主语与主句主语不相同时,若从句主语与主句主语不相同时,sothat可转换为可转换为enough for sb to结构结构 。 The box is so light that he can carry it. The box is light enough for him to carry 二、当二、当that
5、引导的从句为否定式时,引导的从句为否定式时, 1. 若从句主语与主句主语相同时,若从句主语与主句主语相同时,sothat可转可转换为换为enough to的否定结构;同时要注意,的否定结构;同时要注意,转换转换后的形容词(副词)要用其相应的反义词后的形容词(副词)要用其相应的反义词 ; The man is so old that he cant go to work. The man isnt young enough to go to work 4.若从句主语与主句主语不相同时,若从句主语与主句主语不相同时,sothat可可转换为转换为enough for sb to的否定结构。同时要注的
6、否定结构。同时要注意,意,转换后的形容词(副词)要用其相应的反转换后的形容词(副词)要用其相应的反义词义词 ; The desk is so heavy that I cant move it. The desk isnt light enough for me to move. C. enough to的句式为否定式时,的句式为否定式时,enough to可以可以转换为转换为tooto结构。但转换后的结构。但转换后的tooto结构中结构中的形容词(副词)要用其相应的反义词。的形容词(副词)要用其相应的反义词。 He is not old enough to do the work. He i
7、s too young to do the work. The problem is too difficult for me to work out. The problem isnt easy enough for me to work out. 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 cant reach the buttons of the li
8、ft.The boy is _ short _ _ the buttons of the lift.The boy isnt _ _ _ _ the buttons of the lift. so thattoo to reach tall enough to reach 1. The soup is so hot that l cant have it. 用用tooto 和和so.that 句型转化句型转化2. This question is too difficult for us to work out.用用not . enough to 和和so.that 句型转化句型转化3. Th
9、e forest is so big that we cant walk out of it.用用tooto 和和not . enough to 句型转化句型转化4. The diver drinks too much beer /bi/ to drive the car safely.用用not . enough to 和和so.that 句型转化句型转化5. The boy is too young to go to school. 用用not . enough to 和和so.that 句型转化句型转化 1.The soup is too hot for me to have The s
10、oup is not cool enough for me to have it. 2. This question is so difficult that we cant work it out. This question is not easy enough for us to work out 3.The forest is too big for us to walk out of The forest is not small enough for us to walk out of it 4.The driver drink so much beer that he cant driver the car safel
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