Word · Frequency #5989
ascertained
查明，弄清，确定
ascertained is the past of ascertain.
find out or learn with certainty
常用于正式或书面语境
- 1.
To find out definitely; to discover or establish.
确定；发现或建立。
确定；发现或建立。；确定；查明；[法] 查明；弄清
In use
The detective tried to ascertain the truth from the witness.
After reviewing the data, the scientists ascertained the cause of the error.
The committee is currently ascertaining the financial impact of the proposal.
ascertain that clause
that从句通常陈述已确认的事实。
The doctor ascertained that the patient had recovered.
医生查明病人已经康复。
ascertain + wh-clause
wh-从句如whether, how, what等。
We need to ascertain whether the report is accurate.
我们需要查明报告是否准确。
ascertain + noun phrase
名词短语常为事实、真相、原因等抽象概念。
Investigators tried to ascertain the cause of the fire.
调查人员试图确定火灾的原因。
Verb forms
base ascertain · third person ascertains · -ing ascertaining · past ascertained · past participle ascertained
Common mistakes
He ascertained his innocence in court.He asserted his innocence in court.
学习者混淆了'ascertain'（查明）和'assert'（声称）。'Ascertain'表示通过调查确定事实，而'assert'表示自信地声明。在表达声明主张时应用'assert'。
The detective needs to ascertain about the cause of the fire.The detective needs to ascertain the cause of the fire.
'Ascertain'是及物动词，直接跟宾语，不需要介词'about'。错误地添加介词是受到中文表达'查明关于'的影响。
Connections
Collocations
- ascertain the facts
- 查明事实
- We need to ascertain the facts before making a decision.在做出决定之前，我们需要查明事实。
- ascertain the truth
- 查明真相
- Detectives worked tirelessly to ascertain the truth.侦探们不遗余力地查明真相。
- ascertain whether/if
- 查明是否
- The doctor ran tests to ascertain whether the patient had been infected.医生进行检查以确定病人是否被感染。
- ascertain the cause
- 查明原因
- An investigation was launched to ascertain the cause of the fire.已展开调查以查明火灾原因。
- ascertain the identity
- 确认身份
- Police used DNA analysis to ascertain the identity of the victim.警方使用DNA分析来确认受害者的身份。
Learner notes
Memory Tip
as certain 的合音，意为确定、查明。
Context & Register
通常用于正式语境，如法律、调查、学术研究等，表示通过努力查明事实或真相。
Pronunciation & Spelling
Words ending in -tain pronounced /teɪn/ (contain, obtain, retain, detain, entertain) rhyme with ascertain. Note: 'certain' shares spelling but is pronounced /ˈsɜːrtən/ (no /eɪ/ sound).
Usage priority
Collins 词频等级为 1，建议结合例句记忆，而不是只背中文释义。
Learn the forms together
页面下方列出了常见词形变化。学习时注意它们在句子中的语法位置。
Dictionary facts from ECDICT, WIKTIONARY, WORDNET.