It was terrible for her_______ in such a way.

It was terrible for her_______ in such a way.
A.to have embarrassed B.to be embarrassed
答案为什么为B?怎么看出是不定式的这种形式的?谢谢

用不定式做状语,表目的.
她这样出丑实在是很不好.embarrass是个主动动词,按着句意,她是被出丑,受尴尬,所以选B；另外embarrassed是形容词,意思是尴尬.
关于不定式的用法很多,请参考：
1．作主语
作主语用的动词不定式常常用it替代,动词不定式（或短语）放在后面.例如：
It's easy to get lost in a big city like Tokyo．在东京这样的大城市容易迷路.
It is terrible to see the ship sinking into the sea．目睹轮船沉入大海,真是太可怕了.
2．作宾语
Indians like to eat hot food．印度人喜欢吃辣味食品.
They need to look at a map．他们需要查看地图.
有的动词不定式在作带有补足语的宾语时,前面往往带有形式宾语it.例如：
Do you think it necessary for us to learn to wait?你认为学会等待对我们来说很必要吗?
They improved the software to make it easier for people to use computers．他们改进了软件,使人们使用计算机更简便了.
3．作表语
It seems to be an interesting book．它看起来是本有趣的书.
The old man's job is to take care of the flowers in the garden．这位老人的工作是照料花园里的花.
4．作宾语补足语
He told me not to bring you anything．他叫我不要给你带任何东西.
Who taught you to play the music?谁教你弹这支曲子的?
5．作定语
动词不定式作定语时,要放在它所修饰的名词或代词后面.例如：
In my dreams I always have very difficult jobs to do．我在梦里总是做一些艰难的工作.
Every day he made one of the smaller animals bring him something to eat．他每天叫一个小动物给他带来吃的东西.
6．作状语
（1）表示目的
You can hide under my seat when the conductor comes to check the tickets．当列车员来查票时,你可以藏在我的座位下面.
In his third year,he left Harvard to work for a company called Microsoft．在三年级时,他为了去微软公司工作而离开了哈佛大学.
（2）表示结果
动词不定式作状语表示结果时常与副词too或enough连用.例如：
It's too heavy to carry．太重了搬不动.
The Californian ship arrived too late to save more people．加利福尼亚号来得太晚,没能挽救更多的人.
7．和某些形容词连用
和动词不定式经常连用的形容词有sure,ready,happy,sorry,afraid等.例如：
He's very happy to see his wife．他见到妻子非常高兴.
I'm sorry to trouble you．很抱歉打扰你了.
8．和疑问词who,what,when,where,which,how构成不定式短语作宾语.例如：
I don't know how to use a computer．我不知道怎样使用计算机.
Can you tell me when to start?你能告诉我什么时候出发吗
1.不定式的被动态是由to be + -ed 分词或to have been+ -ed分词构成.
2.不定式通常带to ,但在某些搭配中不带to ,在另一些搭配中既可带to 也可以不带to .例如：在would rather/would sooner/would(just)as soon,may/might(just) as well,cannot but/cannot help but等情态动词之后不带to .would rather/would sooner/would(just)as soon 之后也能跟than/as 分句,在这种分句中也不带to.例如:I would just as soon stay as go.
3.如果except/but之前有动词"do"的某种形式,其后通常用不带to不定式（就是不带to的意思）,否则带to.
4.在Why.../Why not...句式中,也不带to.
5.当两个带to不定式由and或or连接是,第二个不定式符号常可省略.例如I intend to call on him and discuss this question again.但若两个并列的带 to不定式有对比含义,第二个不定式符号便不能省略 ：To be or not to be,that is the question.当三个或三个以上带 to不定式构成排比结构时,所有的不定式符号均须保留：Read not to contradict or confute;nor to believe and take for granted;nor to find talk and discourse;but to weigh and consider.(Bacon)
这是我从别处转来的,很详细,有时间的话lz可以看看.