以f或者fe结尾的单词变为复数时要把f或者fe改为v再加上es,比如：knife-knives、wife--wives

相关介绍

Two knife racks hold her favourite knives.

两个刀架上存放着她最心爱的刀具。

Put the knives in the kitchen drawer

把这些刀具放到厨房抽屉里。

Many wives felt tied to housework.

很多妻子觉得自己被家务束缚住了。

Their wives are sisters.; They are in-laws.

他们是连襟。