形容词 “certain” 可以表示 “确定的，肯定的”。常用搭配有 “for certain” 和 “be certain about something”。此外，“certain” 还可以用来在不提供细节的前提下表示 “某个特定的人或事物”。这个视频教你 “certain” 的常见用法。
用法总结
1 形容词 “certain” 可以表示 “百分百确定的，有把握的”。
I am certain that Tuesday is the day before Wednesday.
Are you certain we are at the right place?
2 搭配 “for certain” 表示 “肯定地，确定无疑地”。
Tuesday comes before Wednesday, for certain.
He can't say for certain whether they'll be on time or not.
3 搭配 “be certain about something” 表示 “对某事有把握、很确定”。
I am certain about the length of this video. It's one minute long.
She is certain about the date of the event.
4 “Certain” 还可以表示 “某个，某些，某位”，代指 “事物或人”，但不提供具体细节。
Hello? Boss? For certain personal reasons I can't come to work today.
Certain foods are easier to buy than others.
用法总结
1 形容词 “certain” 可以表示 “百分百确定的，有把握的”。
I am certain that Tuesday is the day before Wednesday.
Are you certain we are at the right place?
2 搭配 “for certain” 表示 “肯定地，确定无疑地”。
Tuesday comes before Wednesday, for certain.
He can't say for certain whether they'll be on time or not.
3 搭配 “be certain about something” 表示 “对某事有把握、很确定”。
I am certain about the length of this video. It's one minute long.
She is certain about the date of the event.
4 “Certain” 还可以表示 “某个，某些，某位”，代指 “事物或人”，但不提供具体细节。
Hello? Boss? For certain personal reasons I can't come to work today.
Certain foods are easier to buy than others.
