not only he but also i m a student. not only i but also he is a student.
I not only like but also teach students.（动词没有额外的变化）.
I like not only movies but also books.（宾语也没有额外的变化）.
He is not only tall but also strong..（表语也没有额外的变化）.
I find the story not only interesting but also instructive.（宾语补足语也没有额外的变化）.
唯一注意的是主语的就近原则.