yesterday：昨天
adv. 昨天
n. 昨天；往昔；过去
例句：
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1.She left yesterday.
她昨天走了。
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2.Yesterday she announced that she is quitting her job.
昨天她宣布打算辞职。
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3.Schoolgirls [play volleyball] in Xanthi.
女学生正在打排球。
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4.Was he playing football yesterday afternoon?
昨天下午他在踢足球吗？
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5.I heard a concert on the radio yesterday.
咋天我听了收音机广播的音乐会。
常用短语：
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1. all day yesterday
昨天一整天
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2. yesterday's meeting
昨天的会议
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3. the day before yesterday
前天
