AS是一个常用的连词，它可以引导原因状语从句，表示“因为”，“由于”。下面是一些AS引导的原因状语从句例句：
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As it was raining heavily, we decided to stay indoors. 由于下雨很大，我们决定待在室内。
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As he was feeling unwell, he decided to skip the meeting. 由于他感觉不舒服，他决定不参加会议。
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As she had to catch an early flight, she went to bed early. 由于她得赶早班飞机，她早早就上床睡觉了。
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As the traffic was bad, we arrived late for the movie. 由于交通堵塞，我们看电影迟到了。
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As he didn't have enough money, he couldn't buy the book. 由于他没有足够的钱，他不能买这本书。
总之，AS引导原因状语从句可以帮助我们更好地表达原因，使句子更加完整和流畅。
