关于not only but also 连接谓语时的问题
其中一个谓语是be动词,另一个是其他动词时该怎么用.比如
a、Mary not only is very kind but also can do housework.
b、Mary is not only very kind but also can do housework.
哪个对呢.或者不能这么用.
能不能加一个频率副词呢.比如：
I not only listen to the music bot also watch TV after school.
English was not only used in science but also can help us watch English movies.
能不能在上两句加一个频率副词often.如果能.在哪加.