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主动语态比被动语态直接而有力，多用主动语态，可以使文章充满朝气，呈现活力。在下列两组句子中， （b）比（a）有力： （1） a.My first visit to New Zealand will always be remembered by me. b. I will always remember my first visit to New Zealand. （2） a.The crowing of cocks could be heard at dawn. b. The cocks crow came with dawn. 虽然如此，在某些情况下，非用被动语态不可。前此已提过这事，这里不再重述。这里只有指出其中一点，就是有些动词，如 base, schedule, expect, suppose 等，通常以被动语态形式出现。 例如： （1）This survey was based on facts. （2）The last train is scheduled to leave at 9pm. （3）You are expected to come on time. （4）All are supposed to work hard. 除了上述这些动词之外，还有十种，几乎都以被动式出现。 （一）有关疾病的动词，如： （1）Helens left lung is infected. （2）He is confined to the house by illness. （3）The old man was seized with sudden chest pains. （二）有关疲乏的动词，如： （4） I am completely exhausted after the game. | 
