"Yesterday" in Engpsh can be expressed as "yesterday".
The word "yesterday" comes from Old Engpsh "geostran dæg", which means "day of the past".
Examples of "yesterday" in a sentence:
I saw her yesterday. (昨天我见到了她。)
Yesterday was a beautiful day. (昨天是个美好的一天。)
I did my homework yesterday. (昨天我完成了作业。)