1
be dumbfounded at/by sth.
被动语态，表示对某事感到震惊。
We were dumbfounded by the news.
我们被这个消息惊得目瞪口呆。
使惊讶得发呆
先理解核心含义，再看它在真实句子里的用法。
使惊讶得发呆
be a mystery or bewildering to
We were dumbfounded by the news.
我们被这个消息惊得目瞪口呆。
常用于被动语态
使困惑和迷惑；使无言以对
To confuse and bewilder; to leave speechless.
dumbfound
Base
原形
dumbfounds
3rd person
第三人称单数
dumbfounding
-ing
现在分词
dumbfounded
Past
过去式
dumbfounded
Past participle
过去分词
His sudden question dumbfounds me.
他突然的问题让我目瞪口呆。
常用于被动语态
The sudden news dumbfounded everyone in the room.
这突如其来的消息让房间里的每个人都惊讶得目瞪口呆。
It was a dumbfounding experience to see the magician make the elephant disappear.
看到魔术师让大象消失，那是一次令人惊讶得发呆的经历。
She was dumbfounded by the complexity of the math problem.
她被那道数学题的复杂性搞得惊讶得发呆。
被动语态，表示对某事感到震惊。
We were dumbfounded by the news.
我们被这个消息惊得目瞪口呆。
后接不定式，表示做某事时感到震惊。
She was dumbfounded to learn the truth.
她得知真相后惊得说不出话来。
主动语态，直接跟宾语。
His reply dumbfounded me.
他的回答让我惊讶得发呆。
后接that从句。
I was dumbfounded that he could be so rude.
他竟如此粗鲁，我惊愕不已。
Not this
I am dumbfound by the news.
Use this
I am dumbfounded by the news.
“dumbfound”是及物动词，表示“使惊讶”，不能直接用作形容词；描述状态时必须用过去分词形式“dumbfounded”。
Not this
He dumbfounded when he saw the accident.
Use this
He was dumbfounded when he saw the accident.
“dumbfound”是及物动词，通常需要宾语或在被动语态中使用；表示某人惊讶的状态时应用被动结构“be dumbfounded”。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
被……惊得目瞪口呆
She was dumbfounded by the news.
她被这个消息惊得目瞪口呆。
使某人惊愕不已
The magician's trick left the audience dumbfounded.
魔术师的戏法让观众惊愕不已。
完全目瞪口呆
He stood there utterly dumbfounded, unable to speak.
他站在那里完全目瞪口呆，说不出话来。
惊愕的沉默
The announcement was met with dumbfounded silence.
这一宣布引来一片惊愕的沉默。
目瞪口呆的神情
She gave me a dumbfounded look when I told her the truth.
当我告诉她真相时，她露出目瞪口呆的神情。
彻底惊呆
We were completely dumbfounded by his sudden resignation.
我们被他突然辞职彻底惊呆了。
Use dumbfound naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
联想：哑巴（dumb）被难题‘找到’（found），惊得目瞪口呆、说不出话。
语域：formal 常见场景：written narrative、news reporting、formal discussion dumbfound 通常偏正式，多用于书面叙述或正式场合，口语中比较少见；常见于被动句式 be dumbfounded at/by sth.。
常用于被动语态，如 be dumbfounded at/by sth.
Dictionary facts from ECDICT, WIKTIONARY.