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语态有两种:主动语态(Active Voice)和被动语态(Passive Voice) 主语是动作的发出者为主动语态;主语是动作的接受者为被动 语态

A conditional sentence (or \conditional\ for short) is commonly composed of two parts: conditional clause main clause. Despite the many possible sequences of verb forms in conditionals, the following four types represent perhaps the commonest and the most useful ones:

1 Definition Subordination means putting a grammatical unit in a lower rank or position. A grammatical unit that functions as a constituent of another unit of equal or lower rank of structure is called subordinate constructi, which might

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