知识点复习: so adj/adv that +肯定句 = adj./adv enough to do so adj/adv. that + 否定句 = too adj./adv. to do 如果主句和从句主语不一致的话,要在to前面加上for sb. 根据以上知识点改写以下表结果的句子,不改变意思。 I am so tired that I can't go on walking. This problem is so difficult that I can't work it out. The apple is too hard for Grandma to eat.