1
be a bonehead
直接形容某人愚蠢。
He is such a bonehead for forgetting his passport.
他忘了护照，真是个笨蛋。
笨蛋
先理解核心含义，再看它在真实句子里的用法。
笨蛋
a stupid person; these words are used to express a low opinion of someone's intelligence
He is such a bonehead for forgetting his passport.
他忘了护照，真是个笨蛋。
愚蠢的人；用来表达对某人智力的低评价
a stupid person; these words are used to express a low opinion of someone's intelligence
He forgot the meeting again—what a bonehead!
他又忘了开会——真是个笨蛋！
Only a bonehead would try to fix a leaky pipe without turning off the water.
只有笨蛋才会不关水龙头就去修漏水的水管。
I made a bonehead move by deleting the wrong file.
我删错了文件，犯了个愚蠢的错误。
直接形容某人愚蠢。
He is such a bonehead for forgetting his passport.
他忘了护照，真是个笨蛋。
用于指责或评价他人。
It's rude to call someone a bonehead.
叫别人笨蛋是不礼貌的。
Not this
He is so bonehead.
Use this
He is so boneheaded.
在英语中，“bonehead”是名词，意为“笨蛋”；如果想表达“很笨”的形容词含义，应使用“boneheaded”。汉语中“笨蛋”可直接用作谓语，但英语需要转换词形。
Not this
He is bonehead.
Use this
He is a bonehead.
英语可数名词作表语时，通常需要冠词。汉语中没有冠词概念，学习者容易遗漏“a”。
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常用于贬义，形容某人愚蠢。
Dictionary facts from ECDICT, WIKTIONARY.