yestern
/'jestən/yesterday morning "I had a delicious breakfast yestern." "I remember seeing him in the office yestern."
adjective [原级] adj.昨日的，在这以前的
We made plans to go hiking yestern, but it rained so we couldn't go. 我们原本计划昨天去远足的，但那天下雨了，所以我们没能去成。
