2、有些名词为自然复数名词，即只有复数的形式，例如：

trousers(裤子)glasses(眼镜)scales(天平)tongs(夹子)binoculars(双筒望远镜)

pincers(手钳)compasses(圆规)pants(裤子)crossroads(十字路口)pliers(钳子)

scissors(剪刀)shears(大剪刀)shorts(短裤)spectacles(眼镜)tweezers(镊子)

jeans(牛仔裤)briefs(三角裤)earphones(耳机)braces(背带)cords(灯芯绒裤)

knickers(短衬裤)sunglasses(太阳镜)tights(紧身衣)overalls(工装裤)trunks(游泳裤)pajamas(睡衣裤)underpants(内裤)slacks(便装裤)specs(眼镜)nail-clippers(指甲刀)stairs(台阶)suds(肥皂沫)ashes(灰烬)commons(平民)curtains(幕布)

draffs(残渣)outskirts(郊区)remains(遗骸)wages(工资)arms(武器)fireworks(烟火)oilcolours(油画)thanks(感谢)congratulations(祝贺)assess(资产)livingquarters(住宅区)clothes(衣服)