Question

like在什么时候加s,在什么时候不加

Answer 1

你是指 like 作为名词吧？
名词 like 有两个意思： 1. 喜欢/爱好 2. 一样的人物/东西
作为名词 like 通常用于复数形式， 比如 likes and dislikes
例句：
John and I have a lot in common. We share many likes and dislikes.
This is unacceptable behaviour. I've never seen the likes of this from anyone.
唯一的单数用法见下：
He was an exceptional human being. We'll never see his like again.
指独一无二的、同样一个人（物），用于物主代词后。