为什么Let's play basketball.That sounds ( )的答案是good,而不是well

让我们玩游戏!let's play game还是let's play a game只能二选一,为什么 let's play pc games 为什么要加s是let's play play computer games，发错了 Let's Play! Let's play a let’s play! Let's-play-together. Let's play tennis. Let`s play.OKthank let's play doctors. Let's play football. 比如说:let's play computer games,game后为什么+s? Let’s enjoy the pleasure of basket together ,ok Let's play Bingo now. let‘s play ___ basketball let’s play 的意思? let's play computer games. Let's play ping-pong. then let s play volleyball?