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cook的适当形式是什么

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cook的适当形式是什么
cook 有两种词性:名词和动词.
名词:厨师,做饭的人.John is a cook.He prepares food for school children.
动词:及可做及物动词,也可用作不及物动词.词尾属规则变化,即过去时 -ed,过去分词 -ed,现在分词 -ing.
例句:
John cooks at a school.(不及物动词,一般现在时)
He cooked a delicious meal yesterday.(及物动词,过去时)
He will not cook Chinese food for dinner.(及物动词,一般将来时)
He has cooked for 20 years.(不及物动词,现在完成时)
He is cooking for lunch now.(不及物动词,现在进行时)