they're going to the lake这句里有动作吗?

问题描述:

they're going to the lake这句里有动作吗?
they're going to the lake,they're going to the mountains,
be going to 有表示计划和准备,或者说是计划做,准备做某 事,但后面接个the lake 或者the mountains ,准备湖?准备山?准备做湖?准备做山?
难道be going to 还有去的意思?与be going to go to 一样?
不理解.

they're going to the lake 有动作的,动作就是going(去),本来是be going to go to 的,但有两个go,为了避免重复累赘,省去了后面的go.但要按照原来那样理解