一、（in ）my bedroom ，在卧室里。in是在......里面、on在......上面、under在......下面、
with的用法较多，有下面15种：
1.与...一起,偕同,和...
She lives with her son.
她和儿子住在一起。
2.带着...;有...的
The girl with long hair is my classmate.
长头发的女孩是我同学。
3.以(手段、材料),用(工具)
My American friend is learning to eat with chopsticks.
我的一位美国朋友在学着用筷子吃饭。
4.符合,一致
5.在...一边,赞成
We are with you there.
在那一点上我们站在你这一边。
6.跟...,反对
The Allied Forces fought with Germany.
盟军跟德国交战。
7.顺...方向,跟...一起
8.加上,包括...在内
His bank savings, with his wife's jewels, amount to three million dollars.
他的银行存款加上他太太的首饰合计达三百万元。
9.随着,对应
An independent man, Peter never goes with the tide.
彼得是个有主见的人,从不随大流。
10.在...身边,在...身上
He had a gun with him.
他带了枪。
I have no money with me.
我身边没有钱。
11.与...(相比)
12.跟...(分手)
I parted with my brother in Paris.
我跟我兄弟在巴黎分手。
13.尽管有
With all the setbacks, he did not lose heart.
尽管遭受种种挫折,他没有丧失信心。
14.由于,因为
They were wild with joy.
他们欣喜若狂。
15.(与副词连用构成祈使句,表示强烈的愿望)
Down with fascism!
二、What are they doing？翻译为：他们正在做什么。
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