"Watch an animated film" 用英文表达为 "watch an animation" 或 "watch an animated movie"。

"Animation" 是英文动画的意思，来源于拉丁文 "animatio"，意思是 "the act of giving pfe or movement to something"。

例句：

I'm going to watch an animation tonight.
(今晚我要看一部动画片。)
Do you want to come over and watch an animated movie with me?
(你想过来和我一起看一部动画电影吗？)

希望这对您有帮助。