yesterdayn.昨天；近来adv.昨天；近来Yesterday I had toothache.昨天我牙疼。Yesterday was my birthday.昨天是我的生日。Yesterday was a rainy day.昨天是多雨的一天。Yesterday he caught a cold.昨天他患了感冒。Yesterday it rained all day.昨天整天下雨。Yesterday Tom made a mistake.昨天汤姆。Yesterday was a good example.昨天就是一个很好的例子。Yesterday can not help anything昨天你来不及Yesterday I changed your diaper昨天我换了你的尿布Yesterday is a canceled check.昨天是支票；已经付讫.