yesterday/'jestədeɪ, -dɪ $ -tər-/

ad. on the day before today

n. the day before today

ad. 昨天：He didn't go to school yesterday. 他昨天没上学。

n. [U] 昨天：Yesterday was Friday. 昨天是星期五。

◇I met him the day before yesterday. 我前天碰到了他。

◇I met her at yesterday's party. 我在昨天的派对上碰到了她。

常犯错误

✗ He left last morning.

✓ He left yesterday morning. 他昨天上午离开的。

[✌yesterday morning/afternoon中的yesterday不能替换为last，但可说yesterday(或last) evening，多说last night]