Don't turn off the lights.不要关灯.
When do you listen to the radio 我六点听收音机.
I go to bed at nine o clock.(问句)我九点睡觉 --
对时间提问：When do you go to bed
对事件提问：What do you do at nine o clock?
一般疑问句:Are you go to bed at nine o clock?
My mother is cooking.我妈妈在做饭 问句 ---
对人物提问：Who is cooking now?
对事情提问：What does your mother do
一般疑问句:Is your mother cooking?
We drink milk in the morning我们在早上喝牛奶问句---
对事物提问：What do you drink in the morning?
对时间提问:When do you drink milk?
一般疑问句:Are you drink milk in the morning?