It be presumptuous of sb to do sth
此句型用 it 作形式主语，of sb 表示行为主体，to do sth 说明具体行为。
It would be presumptuous of me to speak for the whole team.
我替整个团队发言就太冒昧了。
冒昧的；放肆的
做出无根据的假设或臆断,常因傲慢或过度自信而超越适当或正当的界限；过分冒失的；傲慢的
Showing too much confidence and behaving or assuming things beyond what is appropriate or rightful; taking unwarranted liberties.
做出无根据的假设或臆断,常因傲慢或过度自信而超越适当或正当的界限
Making unwarranted presumptions or assumptions, often out of arrogance or excessive self-confidence, and thus exceeding appropriate or rightful limits.
过分冒失的
excessively forward
It was presumptuous of him to assume he would get the promotion without even applying.
他连申请都没提交就认为自己会得到晋升，真是太冒失了。
用法提示：presumptuous在此句中表示主观臆断、过分自信的行为。
AI contextual example
She felt it was presumptuous to ask her boss for a raise after only two weeks on the job.
她觉得才工作两周就向老板要求加薪太过放肆。
用法提示：presumptuous描述了一种不顾场合的冒昧请求。
AI contextual example
Calling him by his first name without permission seemed presumptuous to the new intern.
未经允许就直呼其名，在新来的实习生看来十分无礼。
用法提示：presumptuous在这里指社交中过于随便、不尊重他人的行为。
AI contextual example
此句型用 it 作形式主语，of sb 表示行为主体，to do sth 说明具体行为。
It would be presumptuous of me to speak for the whole team.
我替整个团队发言就太冒昧了。
主语是人时，表示某人做某事显得冒失或越界；语气比 it 句型更直接。
He was presumptuous to question the manager's decision.
他质疑经理的决定，太放肆了。
in doing sth 强调在做某事的过程中表现出的冒失态度。
She was presumptuous in assuming she would be invited.
她擅自假定自己会被邀请，实在冒昧。
常用于褒义“勇敢”，在社交场合指冒失；语气比 presumptuous 轻，且不像它那样强调无根据的假定。
指对不熟的人过分亲近、失礼；侧重社交分寸，而非逻辑上的臆断。
强调对长辈或上司不敬，多指言谈失礼；比 presumptuous 更直接地包含不尊重。
语气更强，指公然无礼、厚脸皮；常用于责备他人的胆大妄为。
兼有“大胆”与“冒险”色彩，可能因勇敢而受钦佩或因蔑视规矩而受批评；与 presumptuous 的“越界假设”略有差异。
grammar · medium
易错句子He presumptuous to ask such a personal question.
正确表达He was presumptuous to ask such a personal question.
presumptuous 是形容词，作表语时必须与系动词 be 连用，不能像中文“他冒昧”那样直接省略 be。这里描述的是过去的行为，因此用 was。
grammar · medium
易错句子It was presumptuous for him to ask such a personal question.
正确表达It was presumptuous of him to ask such a personal question.
在 It is + 形容词 + of/for sb. + to do 句型中，presumptuous 这类评价人品性或行为的形容词后应用 of 连接人，表示“某人这样做是冒昧的”；用 for 则语义不符合这种评价结构。
针对“过分冒失、越界”这一义项，指不夸大自身、行为不逾矩。
与“傲慢自大”相对，指不把自己看得过高。
强调低调内敛、不显摆，与“过分自信而冒失”相对。
与“过度自信而冒失”相对，但语义偏胆怯，不完全是褒义。
指言行内敛克制、不轻易越界，与“放肆”相对。
presumptuous 形容人言行冒昧、放肆；presumptive 表示“推定的、预期的”，指基于证据或法律推断，而非行为态度。
assuming 作形容词时侧重态度傲慢、自以为是，且更常作连词“假设”使用；presumptuous 则强调未获许可就越界、做出无根据的假设。
pretentious 指刻意炫耀、装腔作势以显得重要；presumptuous 指擅自冒犯、无根据地越界。
某人做某事很冒昧
It was presumptuous of him to assume she would lend him the money.
他擅自假定她会借钱给他，实在是太冒昧了。
冒昧的行为；放肆的举止
His presumptuous behavior at the meeting annoyed everyone.
他在会上冒昧的举止让大家都感到不悦。
放肆的话；冒昧的言论
She apologized for her presumptuous remark about his private life.
她为自己对他私生活的冒昧评论道了歉。
无根据的臆断；自以为是的假设
It would be a presumptuous assumption to think the project will succeed without proper planning.
认为没有适当规划项目就会成功，是一种自以为是的臆断。
显得冒昧；显得放肆
I don't want to seem presumptuous, but may I offer some advice?
我不想显得冒昧，但我可以提点建议吗？
pre- (before) + sumpt (take) + -uous (full of); literally 'taking before' → overstepping
pre- (before) + sume (take; from Latin sumere)
pre- (before) + sumpt (take) + -ion (noun suffix)
con- (together) + tin (hold) + -uous (full of); shares suffix -uous with presumptuous
冒失的人往往会忽视或越过他人的边界。
冒失行为常指未经对方同意就擅自行动。
presumptuous 的核心含义是做出没有根据的假设。
冒失的人常常违反社交礼仪或礼节规范。
presumptuous 常与“越界”或“逾越本分”的概念连用。
Dictionary facts from ECDICT, WIKTIONARY.