yesterday's + noun
yesterday's 表示“昨天的”，后接名词，注意撇号在 s 前。
I missed yesterday's meeting.
我错过了昨天的会议。
昨天
yesterdays — plural of yesterday
过去；昔日；昨天；前一天；紧接今天之前的一天；过去,常指过时的事物；最近的过去
the day before today
昨天；前一天
The day immediately before today; one day ago.
紧接今天之前的一天
the day immediately before today
过去,常指过时的事物
The past, often in terms of being outdated.
最近的过去
the recent past
Yesterday was my grandfather's eightieth birthday, so the whole family gathered for dinner.
昨天是我爷爷的八十岁生日，所以全家人聚在一起吃晚饭。
用法提示：yesterday 作名词在句中作主语，表示“昨天”（紧接今天之前的那一天）。
AI contextual example
We spent all yesterday rearranging the furniture in the living room.
我们昨天一整天都在重新摆放客厅里的家具。
用法提示：yesterday 作名词，在“spend + 时间”结构中作宾语，表示“昨天”。
AI contextual example
Do you remember yesterday at the park when we fed the ducks?
你还记得昨天在公园里喂鸭子的事吗？
用法提示：yesterday 作名词，作 remember 的宾语，指“昨天”这一天。
AI contextual example
yesterday's 表示“昨天的”，后接名词，注意撇号在 s 前。
I missed yesterday's meeting.
我错过了昨天的会议。
表示“昨天早上/下午/晚上”时，用 yesterday morning 等，前面不加介词。
It rained all yesterday afternoon.
昨天下午一直在下雨。
意为“前天”，前面通常加 the。
We arrived the day before yesterday.
我们是前天到的。
grammar · medium
易错句子I have finished the report yesterday.
正确表达I finished the report yesterday.
yesterday 是明确的过去时间状语，不能与现在完成时连用，因为现在完成时强调与现在的联系，不接受已结束的具体过去时间；表示过去某个时间完成的动作要用一般过去时，所以把 have finished 改为 finished。
grammar · medium
易错句子We visited the museum on yesterday.
正确表达We visited the museum yesterday.
yesterday 本身就能在句中作时间状语，前面不加 on、in、at 等介词；受汉语“在昨天”的影响，学习者常多加一个 on，去掉介词后句子才正确。
grammar · medium
易错句子I couldn't sleep yesterday night.
正确表达I couldn't sleep last night.
汉语“昨天晚上”不能逐字直译成 yesterday night；英语表示“昨晚”固定用 last night，而 yesterday 只与 day 类词搭配，如 yesterday morning、yesterday afternoon。
昨天早上
I saw him at the station yesterday morning.
我昨天早上在车站看见他了。
前天
She arrived in Beijing the day before yesterday.
她前天到的北京。
就在昨天；仿佛就在昨天
It seems like only yesterday that we first met.
我们初次相遇仿佛就在昨天。
昨天的新闻；过时的消息
Don't worry about that report—it's yesterday's news.
别在意那篇报道，它已经是过时的消息了。
不是三岁小孩，不容易上当
You can't fool her; she wasn't born yesterday.
你骗不了她，她可不是三岁小孩。
发长 /eɪ/ 音 (如 day, play)
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从昨天起
He has been resting at home since yesterday.
他从昨天起就一直在家休息。