thief的复数是thieves。thief这个英语单词属于可数名词,以f结尾的单词,在变形为复数形式时,需要将f去掉并加上ves,因此,thief的复数形式是thieves。thief的基本意......
shelf的复数形式是shelves,以-f或-fe结尾的名词,一般将-f,-fe去掉,加-ves。如:wife-wives, wolf-wolves, calf-calves.这类名词还有li......