懂英语的学长学姐们进来看看,帮帮学弟,

懂英语的学长学姐们进来看看,帮帮学弟,
She looked at it critically for a moment.'It's all right,'she said,'but isn't it upside-down?' 这句话里面的引号问题让我头晕,为什么在she raid后面的引号里but的b不大写?而——'I'm handing this picture on the wall,'I answered.'It's a new one.Do you like it?'的answered后面的It的i却是大写?而且根据英语语法里要求当said和asked等词置于引语之间时,句子的后半部分以小写字母开始!