他突然出现使我大吃一惊.用英语怎么说？

他突然出现使我大吃一惊.

I was completely nonplussed by his sudden appearance.

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。

completely

adv. 完全地，完整地，完全，彻底，全部，一干二净，很，非常，充分，十分，万分；

例句
...a second career which absorbed her more completely than her acting ever had.
比演艺生涯更让她投入的又一职业

nonplussed

adj. 不知所措的，陷于窘境的；v. 使迷惑( nonplus的过去式和过去分词 )；

例句
She expected him to ask for a scotch and was rather nonplussed when he asked her to mix him a martini and lemonade.
她料想他会要一杯苏格兰威士忌，所以当他请她调一杯马提尼酒加柠檬水时，她有点不知所措。

by

prep. 在…旁边，表示方式，由于，经过；adv. 经过，表示保留或保存时用，短暂拜访；

例句
...expensive make-up that we saw being advertised by a beautiful model...
我们所见的由一位漂亮模特代言的昂贵化妆品

his

pron. (he的所有格)他的，(he的物主代词)他的东西；det. 属于他的，用于名词前，自己的，指某人的，上帝的；

例句
He claimed that his parents had abandoned him...
他声称父母遗弃了他。

sudden

adj. 突然的，未预见到的，急躁的，仓促的，快的，迅速的，急剧；

例句
The sudden appearance of a few bags of rice could start a riot.
突然出现几袋大米可能会引起骚乱。

appearance

n. 外貌，外观，出现，露面，[哲]现象；

例句
It was the president's second public appearance to date...
这是总统到那时为止的第二次公开露面。