Everybody was downstairs watching a movie.是什么意思？

Everybody was downstairs watching a movie.

大家都在楼下看电影。

everybody

pron. 每人，人人，大伙儿，各位；

例句
They're forever bitching about everybody else.
他们永远都在怨别人。

was

v. 用来表示某人或某物即主语本身，用来表示某人或某物属于某一群体或有某种性质（ be的过去式 ），在，存在，不受干扰；

例句
There was a terrible sadness in her eyes...
她眼神中流露出深深的悲伤。

downstairs

adv. 在楼下，向[往]楼下；adj. 楼下的；

例句
She can still come downstairs with assistance but she's very weak.
在有人搀扶的情况下她还是能够下楼的，但是很虚弱。

watching

n. 观察，看守，注意，监视；

例句
He was standing a bit apart from the rest of us, watching us...
他站在离我们其余人不远的地方，看着我们。

movie

n. 电影，电影院，电影业；

例句
This movie has some of the most amazing stunts you're ever likely to see.
这部电影里有一些可能是你见所未见、让人惊叹的特技。