因为突然生病,他不得不请了一周假。

He had to take a week off work due to a sudden illness.

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He had to take a week off work due to a sudden illness.

illness 是名词,由形容词 ill(生病的)加上名词后缀 -ness 构成,表示"疾病"或"生病"的状态。

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