He was caught trying to impersonate a security guard.是什么意思？

He was caught trying to impersonate a security guard.

他假扮警卫被抓获。

he

pron. 他，它，一个人；n. 雄性动物；

例句
Logic had prevailed and he had abandoned the idea.
最终理智占了上风，他打消了那个念头。

was

v. 用来表示某人或某物即主语本身，用来表示某人或某物属于某一群体或有某种性质（ be的过去式 ），在，存在，不受干扰；

例句
There was a terrible sadness in her eyes...
她眼神中流露出深深的悲伤。

caught

v. 赶上( catch的过去式和过去分词 )，接住，引起，看见；

例句
The men were caught in the act of digging up buried explosives.
那些人在挖掘掩埋的爆炸物时被逮个正着。

trying

adj. 令人难于忍受的，难堪的，令人厌烦的；v. 试图( try的现在分词)，试验，尝试，审讯；

例句
Caroline was trying on one outfit after another.
卡罗琳一套接一套地试穿衣服。

to

prep. 向，朝着，到，关于，属于；adv. 朝一个方向的，到某种状态，关闭；

例句
I suggest you leave it to an expert...
我建议你把它留给专家来解决。

impersonate

vt. 扮演，模仿，拟人，人格化；adj. 被人格化了的，体现…的；

例句
Tom was a brilliant mimic who could impersonate most of the college staff.
汤姆的模仿能力是超一流的，他能惟妙惟肖地模仿学院里的大多数老师。

security

n. 安全，保证，担保，保护，防护，有价证券；adj. 安全的，保安的，保密的；

例句
You've illegally accessed and misused confidential security files.
你已经非法访问并盗用了机密的安全文件。

guard

n. 警卫，狱吏，看守，护卫队，防护装置；vt. 保卫，守护，看守，加防护装置，谨慎使用；vi. 警惕，警卫；

例句
A guard was blowing his whistle.
一个警卫正在吹警笛。