昨天今天明天前天后天用英语怎么说

昨天 (yesterday) 是指过去的一天，它来自古英语 "geostran dæg" 的缩写。

例句：

I called you yesterday but you didn't answer. (我昨天给你打电话了，但你没接。)
Yesterday was a sunny day. (昨天是个晴天。)

今天 (today) 是指现在的一天，它来自古英语 "þæt dæg" 的缩写。

例句：

Today is my birthday. (今天是我的生日。)
I'm going to the park today. (我今天要去公园。)

明天 (tomorrow) 是指未来的一天，它来自古英语 "tomærow"。

例句：

I'm going to the beach tomorrow. (我明天要去海滩。)
Tomorrow is a holiday. (明天是假期。)

前天 (the day before yesterday) 是指在昨天之前的那一天。

例句：

I saw him the day before yesterday. (我前天见到他了。)
The day before yesterday was a rainy day. (前天是个雨天。)

后天 (the day after tomorrow) 是指在明天之后的那一天。

例句：

I'm going to the concert the day after tomorrow. (我后天要去音乐会。)
The day after tomorrow is a long weekend. (后天是长周末。)