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大家知道，不可数名词没有表示复数的-s标志，因此前面不可有数目字，只可以有数量词。例如我们可以说①， 不可以说②： ①There is not much furniture in the office. ②There are not many furnitures in the office. 这是不是说不可数名词就不可数呢？不然。相反的，不可数名词也是可数的，主要方法是借重单位词（unit word），如： a piece of, a cup of, a drop of, a lump of, a handful of, a flash of, a blade of, a head of, a bar of, an ear of等。 如果数目是超过一，就以确实数目取代一。例如： two pieces of, three cups of 和 five lumps of 等。 现在试试把上述这类单位词和适当的不可数名词连用。 ① Mr Li has just bought a piece of new furniture. ② Give me a cup of cold water, please. ③ Please put two lumps of sugar in my coffee. ④ The boy picked up two handfuls of sand from the beach. ⑤ We saw a flash of lightning in the sky. ⑥ The gardener pulled out blades of wild grass from the garden. ⑦ She gave bars of chocolate to the visiting children. 有些名词如 scissors, trousers, spectacles, tongs, pliers 等，都以复数形式出现， 如： | 
