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1. 我们是法国人，他们是德国人。 误：We are Frenchmen, and they are Germen. 正：We are Frenchmen, and they are Germans. 析：Frenchman（法国人）其复数形式是Frenchmen，而German（德国人）的复数形式是Germans。 ２.王教授给我提了一些好建议。 误：Professor Wang gave me some good advices. 正：Professor Wang gave me some good advice. 析：advice是不可数名词，不可在其后加ｓ变为复数，也不可在其前面用不定冠词an。如说一项建议，可说a piece of advice. 注意：help虽然无复数形式，但常见有不定冠词。如：Computer is a great help in research. 3. 我们学校有九百多学生。 误：There are more than nine hundreds students in our school. 正：There are more than nine hundred students in our school. 析：dozen,hundred, thousand等词前面有数词表示明确具体的数目时，后面不管有没有of都不用复数形式。如： I have collected over three hundred Chinese stamps since I came here. 4. 昨天她买了几十个鸡蛋。 误：She bought dozen of eggs yesterday. 正：She bought dozens of eggs yesterday. | 
