get on for的用法

我们先来看个例句：

My grandfather is getting on for 80.

我爷爷快要80岁了。

get on for: come near a time or an age，接近……时间或年龄。
　　再如：
　　It's getting on for midnight let's go to bed: 快半夜了，我们睡觉吧。