cloth是不可数名词，意为“布料”，“织物”
I wanted to have a suit made so I bought three and a half yards of cloth.
我想让人给我做一套衣服，所以我买了三码半布料。
当cloth用来指特定用途的布时，是可数名词，可以有复数形式的cloths：
1. She cleaned the window with an old cloth.
她用一块破布擦窗户。
2. Have you any cloths for polishing the furniture?
你有擦家具的布吗？
clothes则是指“衣服”，只有复数形式：
1. He wore ready-made clothes.
他穿做现成的衣服。
2. He soon changed into the dead man’s clothes for sale.
他立即换上了死者的服装。