only是完全倒装还是部分倒装，not

是部分倒装。

当not only 位于句首的时候，它后面的句子应该是部分倒装句。即be动词或助动词或情态动词位于主语前，和一般疑问句的结构是一样的。

如: only can he speak English well ，but also he can speak French well.

2、Not only is the student late， but also he talks in class.

3、Not only did he break the window，but also he didn't admit doing so.