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【题目】The firefighters have already put out the Forest Fire. (改为否定句)

The firefighters ________ put out the Forest Fire _________.

【答案】haven’t yet

【解析】

句意:消防队员已经把森林大火扑灭了。(改为否定句) 消防队员还没有把森林大火扑灭。

根据句意可知这句话的否定意义是消防员还没有将火熄灭,且原句是现在完成时,故否定句也是现在完成时的否定形式,故将have改为haven’t;在现在完成时的否定句中我们用yet 来表示到目前为止。故填 (1). haven’t (2). Yet

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