请大家 给出by the time 的5-10个高水准例句(3~4级水平)谢绝超级难度和超级简单 谢谢

1.By the time I got there,the bus had already gone.

2.By the time I reached home,I realized that I had
left my key in the office.

3.By the time I realized he loves me, he had
alreadygone.

4.By the time I got to classroom,the teacher had
started teaching for 15 minutes.

5.By the time I got up, my brother had been in
bathroom for a few minutes.

6.I had done all the homework by the time my mother
came to my room.