grammar tensethe two gray cats sitting by the trash can belong to a neighbor为什么这里没有are sitting

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grammar tensethe two gray cats sitting by the trash can belong to a neighbor为什么这里没有are sitting
grammar tense
the two gray cats sitting by the trash can belong to a neighbor
为什么这里没有are sitting

grammar tensethe two gray cats sitting by the trash can belong to a neighbor为什么这里没有are sitting
因为句子后面有一个can了.
Can是情态动词.
一个句子里面不可能有两个动词.
这里的sitting by the trash是用来修饰the two gray cats的..所以不用加 are

一个句子只能有一个谓语动词。(并列句除外)
这句话can belong to 是谓语,sitting做后置定语,所以不用are sitting .

sitting=which are sitting
一个定语从句