Find the mistakes 1. They weren’t sleep during the meeting last Monday. 2. He got up early and have breakfast with his family yesterday morning. 3. While I am listening to music, I heard the doorbell. 4. Peter turn on the TV, but nothing happened.

1.sleep->sleeping (the meeting last Monday->thời gian đã xác định trong QK->QKTD)

2.have->had (yesterday morning->dấu hiệu thì QKĐ)

3.am->was (While+QKTD,QKĐ : 1 hành động đang sảy ra thì 1 hành động khác xen vào)

4.turn->turned(vế sau đang dùng thì QKĐ->vế trước cũng phải dùng QKĐ)