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在《定冠词省不得》一文里，谈到了 5 个必须用定冠词的例子。 定冠词也出现在其他 11 种情况中，非同时注意不可。 ⑴用在单数名词前面，以代表同类的人或物，如： ● The ox is a useful animal for farmers. ● This type of work is easier for the teacher than for the student. 但当涉及 man 和 woman 这两个名词时，一般上不必用 the ： ● Man is mortal. ● Woman differs from man in many ways. ⑵用在单数名词前面来表示有关名词的抽象概念，如： ● Dont play the fool. ● Peter is fond of the bottle. ⑶用在数目字前面，如： ● Mr Li is somewhere in the 30s. ● She was not yet born in the 50s. ⑷用在测量单位前面，以表示每（each/per），如： ● Some factory workers are paid by the hour. ● This car usually does 15 kilometres to the litre. ⑸用在比较级形容词或副词之前，以加强其意义，如： ● The teacher explained the idea again, but his students were none the wiser. ● Your mind will function all the better if you have some time away from your work. | 
