副词

名词

看病

Hearing and Writing-(听和写)

失物招领处

1. 昨天
You use yesterday to refer to the day before today.

2. 过去；（尤指）不久前，近日，日前
You can refer to the past, especially the recent past, as yesterday .

1. the day immediately before today

e.g. it was in yesterday's newspapers

2. the recent past

e.g. yesterday's solutions are not good enough
we shared many yesterdays