cloth: 指布,为不可数名词 clothing: 服装的总称,指一件衣服用a piece of, an article of clothes: 统指各种衣服,谓语动词永远是复数,
fell: 也可作fall的过去式；fell作“砍伐”时，它的过去式，过去分词分别为felled, felled.