核心问题
I haven't got enough big nails to mend the cupboard. 我认为上句中的 enough 放错了位置，它应当放在形容词或副词的后边：I haven't got big enough nails to mend the cupboard.
词典解答
可能是常见的英语试题使你产生了定势思维: enough 绝不可放在形容词或副词之前。但是你忘记了这只是副词 enough 的用法; enough 还可用作形容词, 作定语。在上面的句子里, 形容词 enough 是修饰名词短语 big nails 的, 意思是“足够的大钉子”。而 big enough nails 则是指“足够大的钉子”(即副词 enough 是修饰形容词 big 的)。
请对比下面句子并译成汉语：
a) I haven't got good enough books for them.
b) I haven't got enough good books for them.