not so much as的用法

问题描述:

not so much as的用法
有一句话是这么说的:I wasn't trying to please him so much as I was trying to impress him.这句话中,用的是not so much as的词组吗?再看这个句子:we don't worry so much about his job as his health.所以我想知道,so much在这个词组中,是放哪都行吗?
这两句话都是对的。不明白一楼说的“放在最后”指哪个句子

1. 是的.
2.放在最后也可以,但还是原来地方最通顺最好.