enough 修饰名词放在名词前.enough money .enough 修饰形容词/副词放在形容词或副词的后面.old enough be +形容词 enough for sb.to do sth.对某人来说足够做...不定代词做主语,谓语动词用单数.Everyone likes English very much.不定代词后接 to do sth.Would you like something to eat?不定代词修饰形容词,放在形容词前.I want to know something interesting.不定代词放在else前.Anything else?