they sometimes go swimming on sundays为这句话是第三人称为什么动词不加s
问题描述：
they sometimes go swimming on sundays为这句话是第三人称为什么动词不加s
答
因为they是复数,如果是she,he,it,a girl等单人称的时候,后面加's
they sometimes go swimming on sundays为这句话是第三人称为什么动词不加s
因为they是复数,如果是she,he,it,a girl等单人称的时候,后面加's