1
certain + noun
表示不确定具体是谁。
A certain person called for you.
有某个人打电话找你。
某个；某一
certainest — superlative of certain
先理解核心含义，再看它在真实句子里的用法。
某个；某一
definite but not named or identified
A certain person called for you.
有某个人打电话找你。
心中确信；对某事绝对肯定
Sure in one's mind, positive; absolutely confident in the truth of something.
明确但未具体指明或确定的
definite but not specified or identified
无可置疑的；确凿的事实
Not to be doubted or denied; established as a fact.
没有疑问或不确定；自信而坚定的
having or feeling no doubt or uncertainty; confident and assured
There is a certain restaurant near the station that serves amazing dumplings.
车站附近有一家某餐厅，饺子做得特别好吃。
AI contextual example
In certain situations, it is better to stay quiet than to speak.
在某些情况下，保持沉默比说话更好。
AI contextual example
She has a certain charm that is hard to describe.
她有一种难以形容的魅力。
AI contextual example
set aside a certain sum each week
每周留出一定数额的钱。
WordNet
表示不确定具体是谁。
A certain person called for you.
有某个人打电话找你。
表示必然性。
She is certain to win the competition.
她一定会赢得比赛。
表示对某事有把握。
I am certain of his honesty.
我确信他的诚实。
表示确定的事实。
It is certain that he will come.
他肯定会来。
Not this
I certain he is right.
Use this
I am certain he is right.
‘certain’是形容词，不能直接带宾语从句，需要系动词‘am’构成系表结构。
Not this
He will certain come.
Use this
He will certainly come.
‘certain’是形容词，不能修饰动词‘will come’，应该用副词‘certainly’。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
对…有把握
I'm not certain about the exact date.
我不确定具体日期。
确信
She was certain of her success.
她确信自己能成功。
确定地
Nobody knows for certain what happened.
没有人确切知道发生了什么。
某个；某种
A certain person called while you were out.
你出去时有个某人打电话来。
一定会
The plan is certain to fail.
这个计划一定会失败。
确保
Make certain that all doors are locked.
确保所有门都锁好了。
肯定地，无疑地
I know for certain that she will arrive tomorrow.
我肯定她明天会到。
确保，弄清楚
Please make certain that all doors are locked before leaving.
离开前请确保所有门都锁好了。
对…有把握，确信
She is certain of winning the competition.
她确信能赢得比赛。
在这个世界上，除了死亡和税收，没有什么是确定无疑的。
This famous quote, often attributed to Benjamin Franklin, uses 'certain' to mean 'definitely true or inevitable'. It's a common reference in discussions about life's certainties.
这句名言常被归于本杰明·富兰克林，其中'certain'意为'确定无疑的或不可避免的'。常用于讨论生活中的确定事项。
Use certainest naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
联想证书（certificate）代表确定无疑，记住certain意为‘确定的’。
表示‘某个’或‘某种’，用于不具体指明的事物，语气中性。通常用于正式或书面语境，也可用于日常交流。
Only curtain rhymes with certain (both /ˈkɜːrtən/). Other words ending in -ain or -tain (e.g., captain, villain, bargain, mountain, fountain) are spelled similarly but pronounced differently (e.g., /-ɪn/ or /-ən/).
Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.