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presumptive + noun
presumptive 作定语，表示“基于合理推断的”，常与 evidence、diagnosis、treatment 等名词搭配。
The test provides presumptive evidence of infection.
这项检测提供了感染的推定证据。
推定的；假定的；预期的
先理解核心含义，再看它在真实句子里的用法。
推定的；假定的；预期的
based on presumption; presumed
The test provides presumptive evidence of infection.
这项检测提供了感染的推定证据。
基于推测或猜想的；推断的,可能的,假定的。
Based on presumption or conjecture; inferred, likely, presumed.
同 presumptuous(无根据假设的,常因傲慢或过度自信而超出适当或正确范围)。
Synonym of presumptuous (“making unwarranted presumptions or assumptions, often out of arrogance or excessive self-confidence, and thus exceeding what is appropriate or right”).
主要用于“推定证据”中:为某种推定或结论提供合理依据的。
Chiefly in presumptive evidence: providing a reasonable basis for a certain presumption or conclusion to be drawn.
The presumptive reason for the delay was heavy traffic.
延误的推定原因是交通拥堵。
The presumptive cost of the repairs is about two hundred dollars.
修理的预期费用大约是两百美元。
She is the presumptive successor to the team leader position.
她是该团队负责人职位的推定继任者。
presumptive 作定语，表示“基于合理推断的”，常与 evidence、diagnosis、treatment 等名词搭配。
The test provides presumptive evidence of infection.
这项检测提供了感染的推定证据。
heir presumptive 是法律/继承用语，形容词置于名词后，指在更近血亲出生前推定的继承人；注意勿与 presumptuous（傲慢的）混淆。
She is the heir presumptive to the throne.
她是王位的推定继承人。
Not this
He was presumptive to interrupt the meeting.
Use this
He was presumptuous to interrupt the meeting.
presumptive 意为“推定的、预期的”，不含“放肆的”这层意思；表示“自以为是的、放肆的”应使用 presumptuous，两者拼写相近但含义不同。
Not this
I presumptive that he will come.
Use this
I presume that he will come.
presumptive 是形容词，不能直接作谓语动词；表示“推测、认为”需用动词 presume。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
推定继承人
The eldest son is the presumptive heir to the family estate.
长子是家族遗产的推定继承人。
推定诊断；初步诊断
The doctor made a presumptive diagnosis of influenza based on the patient's symptoms.
医生根据患者的症状做出了流感的推定诊断。
推定证据
The fingerprints were presumptive evidence of the suspect's presence.
指纹是嫌疑人到过现场的推定证据。
推定候选人
She became the presumptive nominee after winning the majority of delegates.
在赢得多数代表支持后，她成为推定候选人。
推定获胜者
He is the presumptive winner of the race with only a few votes left to count.
在仅剩少数选票未统计的情况下，他是这场比赛的推定获胜者。
推定治疗
The patient received presumptive treatment for malaria before the test results came back.
在检测结果出来之前，患者接受了针对疟疾的推定治疗。
推定继承人
The king's brother was the heir presumptive until a son was born to the king.
在国王生下儿子之前，国王的兄弟是推定继承人。
推定证据
His fingerprints on the handle were presumptive evidence of his involvement.
手柄上的指纹是他涉案的推定证据。
推定诊断
The doctor gave a presumptive diagnosis of influenza and ordered more tests.
医生给出了流感的推定诊断，并要求做进一步检查。
Use presumptive naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
想象法官在证据未全时，'预先'写下'推定'——presumptive 是有依据的假定，不是瞎猜。
语域：formal 常见场景：法律文书、医学报告、学术写作 presumptive 属于较正式的用词，多出现在法律、医学、学术等专业书面语中，表示“推定的、假定的、预期的”；在一般口语中不太常用，正式表达里更稳妥。
与 presumptive（/prɪˈzʌmptɪv/）真正押韵的词是 assumptive、consumptive、resumptive，它们都以 /ʌmptɪv/ 结尾。注意 perceptive、deceptive、receptive 虽然拼写都以 -ceptive 结尾，但发音是 /ɛptɪv/，与 /ʌmptɪv/ 不同，不押韵。
Dictionary facts from ECDICT, WIKTIONARY.