Are your shirts made of cotton?这里面的名词shirt为什么要加s?而Is the boo

Are your shirts made of cotton?这里面的名词shirt为什么要加s?而Is the boo 4.The shirt is made of cotton.(就cotton提问) the clothes are/is made of cotton? 连词组句 cotton shirt The is of made(.) 用cotton shirt the is of made造句 The ieans ( )cotton.A.are made of B.are made of C.is made of The jeans ( )cotton.A.are made of B.are made in C.is made of 改错:This shirt is made of a cotton. The house is made of glass.这里的glass为什么不加es? I prefer to wear shirts that are made up of p------ cotton,b The jeans are made of cotton.They are Lin Tao's合并一句话 the trousers made of cotton match my coat 这句子里为什么没有 are?如果没有