be a dimwit
dimwit 是可数名词，单数前要加冠词，常用 a complete/real dimwit 加强语气，多带贬义。
Don't ask him to fix it—he's a complete dimwit.
别让他修——他完全是个蠢人。
傻瓜；笨蛋；蠢人
愚蠢无能的人
a stupid or incompetent person
愚蠢无能的人
a stupid incompetent person
Don't be such a dimwit; you left your keys in the car again.
别这么傻了；你又把钥匙落在车里了。
用法提示：dimwit作为名词，指代一个愚蠢的人。
The new intern is a dimwit who can't even operate a photocopier.
新来的实习生是个傻瓜，连复印机都不会用。
用法提示：dimwit用作名词，形容无能的人。
Only a dimwit would believe that obvious lie.
只有傻瓜才会相信那个明显的谎言。
用法提示：dimwit作名词，表示愚蠢的人。
dimwit 是可数名词，单数前要加冠词，常用 a complete/real dimwit 加强语气，多带贬义。
Don't ask him to fix it—he's a complete dimwit.
别让他修——他完全是个蠢人。
复数为 dimwits，可泛指某一群人，语气同样不客气。
The dimwits in charge lost the company millions.
那些掌权的蠢货让公司损失了几百万。
直接称呼对方时用 You dimwit!，语气很重，多用于口语，带侮辱性。
You dimwit! You deleted the whole folder.
你这个蠢人！你把整个文件夹都删了。
call sb a dimwit 中 dimwit 作宾语补足语，用来描述对人的评价。
She called him a dimwit in front of everyone.
她当着所有人的面叫他蠢人。
grammar · medium
易错句子Tom is dimwit.
正确表达Tom is a dimwit.
dimwit 是可数名词，单数形式前必须加不定冠词 a/an。汉语名词前没有冠词，所以容易漏掉。
grammar · medium
易错句子He is very dimwit.
正确表达He is very stupid.
dimwit 是名词，不能用副词 very 直接修饰；要表示“很蠢”应该用形容词 stupid（或 dim-witted）。
grammar · medium
易错句子They are both dimwit.
正确表达They are both dimwits.
dimwit 作可数名词，复数主语后要用复数形式 dimwits，不能保留单数形式。
和 dimwit 拼写相近、都含 -wit，但 nitwit 侧重“傻气、糊涂、没头脑”，语气轻松，多带调侃；dimwit 更强调整个人又蠢又不中用，贬义更重。
idiot 是最常见、最笼统的骂人词，只表示“蠢”，不含“办事无能”；dimwit 除了蠢，还暗指不中用、干不成事，语气不像 idiot 那么冲。
moron 与 dimwit 意思最接近，但原为心理学用语，现在多作强烈侮辱，且只强调智力低，不强调无能；dimwit 更口语、较轻。
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