box的三单为什么加es

因为以s、x、sh、ch结尾的名词变复数要加 es。boxes

n. 小木箱，盒子

Come and help me lift this box.

来帮我抬这个箱子。

The inside of the box was blue.

盒子的内面呈蓝色。

Can you help me with this box?

你能帮我搬这个箱子吗

Can you reach me down that box?

你帮我把那个盒子拿下来好吗

She was holding a large box.

她提着一只大箱子。