复数： sharpeners

The boy is sharpening his pencils with a sharpener .

那男孩正在用卷笔刀削铅笔。

I need your pencil sharpener .

我需要我的铅笔刀。

Could I have a look at the sharpener on the right .

我可以看看右边的那个铅笔刀吗。

Open your pencil-box . Take out your sharpener .

打开你的文具盒.拿着你的削刀.

Here 's my pencil sharpener .

这是我的卷笔刀。