1.A cat argue with a dog. 2.I argue about this article. 3.so do I表示“我也是”.neither do I表示“我也不是”. 顺便提一下,so I do表示“我赞同”Niether I do表示“我不赞同”.要注意区分.so it is with sb表示“某人也是这样”. For eg: -I like English. -So do I. -I don't like eat apple. -Neither do I. -She's pertty. -So I do. _He isn't a good boy. -Niether I do. Mike is an English boy,and his dog is Canadian.So it is with Bill. 麦克是一个英国男孩,但他的狗是加拿大的. 比尔也是一个英国男孩,他的狗也是加拿大的.