Any more？ 还要吗
Are you alone?   你一个人？
Be my guest.    别客气
Don't argue!   不要争辩
Don't bother.    不必麻烦
Forget it！    算了吧
Go ahead！ 请便！
Here you go.    就这样，给
I don't care.   我不在乎
I have no idea.    我不知道
It slipped my mind.   我忘了
It's driving me crazy! 这把我逼疯了
It's my treat. 

What was happening when....?(The Past Continuous Tense 过去进行时)

When I was watering the garden I began to rain.
I was having my breakfast when the telephone rang.
While we were having a party, the light went out.
As I was getting on the bus, I slipped and hurt my foot.
Someone knocked at the door just a

often,always(The Simple Present Tense 一般现在时）
I often go to school by car.
Do you always get up so late?
My friends never visit me.
I rarely listen to the radio.

What happened? (The Simple Past tense 一般过去时)
I ran across the street.
A friendly waiter taught me a few words of Italian.
They made a big deci