为什么Let's play computer games.“game”的后面要加“s”呢?

为什么 We like computer games 要加"s",而 Let's play computer game 比如说:let's play computer games,game后为什么+s? 玩电脑游戏为什么是play computer games 为什么game要加s 还有 ---Let's play computer games. let's play computer games. Let's play computer game的play为什么要用原型 play cpmeputer game,game后面为什么要加s 1.let's play computer games. let's play computer games 否定句 Can we let’s play computer games? Let`s play computer games.怎么回答 —Let’s play computer games, Tony.