Word · Frequency #5989
ascertain
/ˌæsəˈtein/
verb
查明，弄清，确定
核心释义
常用于正式或书面语境
find out or learn with certainty
- 1.
确定；发现或建立。
To find out definitely; to discover or establish.
确定；发现或建立。；确定；查明；[法] 查明；弄清
用法In use
The detective tried to ascertain the truth from the witness.
用法提示：动词原形，表示'查明'
After reviewing the data, the scientists ascertained the cause of the error.
用法提示：过去式，表示'确定'
The committee is currently ascertaining the financial impact of the proposal.
用法提示：现在分词，用于进行时态，表示'正在查明'
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。
相关词与表达Connections
搭配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
学习提示Learner notes
记忆技巧Memory Tip
as certain 的合音，意为确定、查明。
语境与语域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。
发音与拼写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).
用法优先级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。
一起学习词形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.