You left the light on. *left (leave)是“保持某种样子”、“保持某种状态”的意思，表达“电灯一直开着”、“发动机一直开着”、“窗户一直开着”也可以用这种句型。
You forgot to turn off the light. (你忘了关灯了。)
我得洗脸了。
I have to go wash my face. *go wash是go和wash两个动词连用，口语中常用。可以把它看作是go and wash的缩略形式。
该吃早饭了。
It's time to eat breakfast.
It's time to have breakfast.
我还困着呢。
I'm still sleepy.
I'm still drowsy.
我还打哈欠呢。
I'm still yawning.
昨天的酒还没醒呢。
I have a hangover.
我是个夜猫子。
I'm a night person. *“早上起不来”的意思。
I'm a night person. (我是个夜猫子。)
I'm not. (我可不是。)
I'm a morning person. (我喜欢早起。)
我是用咖啡来提神的。
Coffee wakes me up.
Coffee gets me going.
刷牙了吗?
Did you brush your teeth?
Have you brushed your teeth?
我得梳梳头了。
I have to comb my hair.
穿什么好呢?
What should I wear?
What should I wear? (穿什么好呢?)
The red one. (穿红的吧!)
Which dress should I wear?
Which one should I wear?
What should I put on?
快换衣服。
Hurry up and get dressed.
Hurry up and get dressed. (快换衣服。)
Why? (干嘛?)
把睡衣收好。
Put those pajamas away!
Put those pajamas away! (把睡衣收好。)
Oh, I'm washing those. (啊，我正要洗呢。)
我走了，妈妈。
I'm leaving. Bye mom!