not only ...but also 怎样使用?在谓语动词前还是后?

问题描述:

not only ...but also 怎样使用?在谓语动词前还是后?
the real friend can not only share happiness with you,but also help you when you in trouble.
she is not only lovely,but also is very clever.
为什么位置不一样呢?

虽然是一个词组,但也可以将它拆开来看,可将not only看作副词,将but also 看作连词,这样解释就明白了.