系表结构(be...)一般都是表示状态，请问它也可以表示动作吗？

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赞同cgh007老师解答

(1)系动词be 表示动作一般接一些表示动态的方向或者某种立场的介词短语（表动作）

A:表示动态的方向介词短语

The policed are after him.　

警察在追捕。

We shall soon be across the Channel.
我们不久即将渡过英吉利海峡了。

She is into music.   
她喜欢音乐。

He is into me for one hundred yuan .   
他欠我100元。

I'm onto his schemes.   
我觉察到了他的阴谋诡计。

I think we're onto something big.   
我想我们正在干一番大事业。

The children are out of control.

管不住这些孩子了。

B：表示某种立场/决定的介词短语

He was for putting bad men behind bars.

他赞成将坏人关进监狱。

He bought a new car but it turned out to be for the worse.

他买了一辆新车，但是还不如旧的好。

If you're caught stealing you'll be for the high jump.

偷东西被人抓住就要受到严厉的惩罚。

I'm for the hills this year.

今年我要到山区去。

It is against the law to detain you against your will for any length of time. 

无论强制扣押多长时间都属违法。

We thought cheating was against the rules.  

我们认为作弊是违反规定的。

(2)at a loss困惑； 不知所措；亏本地(表状态）

I'm at a loss what to do next.

我不知道下一步怎么办。

He is always at a loss what to say in front of strangers.

他在生人面前总是不知要说什么。

If you buy a house for22000 and sell it for20000 you are selling at a loss.

如果你买房时花了22000英镑，卖时只卖20000英镑，那么你就赔钱了。

Drawn up sharply by an unexpected question, I felt at a loss.

突然被一个意外的问题难住，我感到不知所措。

Many people are at a loss as to what to do in case of a real fire.

一旦真的发生火灾，许

(3)be at war 处于战争状态； 在交战中（表状态）

Their love affair was played out against the background of a country at war.
他们恋爱那时国家正进行著战争。

The country has been at war with its neighbour for two years.
这个国家与邻国已打了两年仗了。

The two sisters are constantly at war with each other.
这两姐妹不时发生争执。

During the Second World War, Germany was at war with almost all the countries in the world.
第二次世界大战期间，德国几乎同世界上所有的国家处于交战状态。

The state of being at war or being engaged in a warlike conflict.
交战处于战争或有战争危险的冲突状态

An official agreement between governments at war, especially one concerning the exchange of prisoners.
交换战俘的协议交战国政府间订立的官方协议，尤指涉及战俘交换的协议。