对什么什么感到吃惊用英语怎么说

"to be surprised by something" 是表达 "对什么什么感到吃惊" 的常用英语表达方式。其中 "by" 是指 "由于"。例如：
I was surprised by the news of his sudden resignation. (我对他突然辞职的消息感到吃惊。)
She was surprised by the size of the cake. (她对蛋糕的大小感到吃惊。)
They were surprised by the turnout at the event. (他们对活动的参与人数感到吃惊。)
除此之外，还有其他一些表达 "对什么什么感到吃惊" 的英语表达方式，如 "to be taken aback by something" (被什么什么吓到)、"to be shocked by something" (对什么什么震惊)等。