结果状语从句课件.ppt

结果状语从句与不定式做结果状语从句与不定式做状语（状语（tooto,enough to)的转换的转换 The boy is so young that he cant go to school.=The boy is too young to go to school.=The boy is not old enough to go to school. Tom runs so fast that he can be a good runner.=Tom runs fast enough to be a good runner.这句句子不能这句句子不能改为改为tooto 句型，因为句型，因为that 后是肯定句。请同学后是肯定句。请同学们注意以上两句句子主句们注意以上两句句子主句的主语和从句的主语是一的主语和从句的主语是一致的。致的。The box is so heavy that the boy cant carry it.=The box is too heavy for the boy to carry.=The box is not light enough for the boy to carry. is so expensive that I cant buy it.=The furniture is too expensive for me to buy.=The furniture is not cheap enough for me to buy. 同学们，以上两句句子同学们，以上两句句子又有什么特点呢？又有什么特点呢？ English is so easy that Jeffery can learn it well.=English is easy enough for Jeffery to learn well.这句句子可以改为这句句子可以改为tooto 句型吗？为什么？句型吗？为什么？ so adj/adv that 肯定句肯定句=adj/adv enough to do so adj/adv that 否定句否定句=too adj/adv to do=原来原来adj/adv 的反的反义词义词 enough to do 如果主句和从句主语不一致的话，如果主句和从句主语不一致的话，要在要在to前面加上前面加上for sb. Rewrite the following without changing the meaning. I am so tired that I cant go on walking. This problem is so difficult that I cant work it out. The apple is too hard for Grandma to eat. He worked so hard that he could finish the work in three days.