A woman together with her children____walking across the street

问题描述:

A woman together with her children____walking across the street
A.is B.are C.be D.being
我知道答案是A,可是为什么是A啊?我们老师说with是状语什么的,所以就是is了,我不懂,求详解.可以追问吗?

with后面接的这都算是后接短语,也可说是状语.主语只是woman,这句话还可以这样写A woman is walking across the street together with her children. 这样看的话就很明显了.如果把with改成and,A woman and her children are.,就是复数了,因为是两个主语,and是并列成分.