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。能写出来吗？

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b对 a不对

I not only often listen to the music but also often watch TV after school.
English is not only often used in science but also can often help us watch English movies.

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