ybxiong168
既可以是可数名词,又可以是不可数名词如:chalk(粉笔),brick(砖),coal(煤)。eg:The teacher wrote on the blackboard with colored chalks.老师用彩色粉笔在黑板上写字。
企业工作号
可以数,我们一般是说there are many chalks in the box.意思是:箱子里有很多只粉笔 然后a piece of chalk是说已经用过的粉笔,there are pieces of chalks in the box意思是:箱子里有粉笔的碎片
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