Not only the fur coat is soft,but it is also warm .为什么前半句不倒装

Not only the fur coat is soft, but it is also warm .
这是not only ...but also 并列的 两个句子
而不是 并列的 两个句子中的句子成分 所以不用 倒装
如果 并列的是两个表语
就应该倒装
如 Not only soft is the fur coat , but also warm
不过 我的观点 并列 两个句子时 也应该倒装
原句 写成Not only is the fur coat soft, but it is also warm 也是对的
字典例句
not only do i know her ,but i am also her friend.
我不但认识她 ,而且还是 她的朋友.