1、I went to school yesterday.

我昨天去学校。

2、I bought a bag the day before yesterday.

我前天买的包。

3、I dated a good friend the day before yesterday.

我前天约的好友。

4、.I finished my homework this morning.

我在早晨就已经完成了作业。

5、The light went out, and the room was plunged into darkness.

灯熄了，屋里陷入一片漆黑。