是a piece of clothing正确还是a piece of clothes正确呢,为什么?

答案：a piece of clothing正确；a piece of clothes错误。解析：clothes无单数形式；a piece of clothing是可以使用的。参考资料：《牛津高阶词典》引文：WHICH WORD?clothes / clothingYou use clothes [pl] to talk about the things that you wear:I'll just put on some clean clothes。You use clothing [U] to talk about clothes in general or a particular type of clothes:the clothing industry ◆ protective clothing。Note that there is no singular form of clothes。You can,however,talk about a piece/an item/an article of clothing。Note also the expression:I haven't got anything to wear (= any suitable clothes) for the party tonight。