因为的单词是because.
例句：
She resigned because of ill health.
她因健康状况不佳而辞职。
I was angry because I played so badly.
我生气因为我弹得这么糟。
Many diets fail because they are boring.
许多规定饮食因单调乏味都不奏效。
He walked slowly because of his bad leg.
他因为腿不方便而行走缓慢。
She's been off work because of sickness.
她因病没有上班。
They abandoned the match because of rain.
因为下雨，他们中止了比赛。
Feed the dogs because they haven't eaten.
喂喂这几条狗，因为它们还没吃呢。
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