關於certain這個字如何用

certain ： 當時應該做的事。

2008-12-16 11:08:14 補充：
語文有時要意會一下， certain 這個字常常用在您問的這種地方；例如：把這東西放到 certain place ，這時『說的人』非常清楚『聽的人』知道要他將『這東西』應該放哪裡， 我一直認為 certain 很難查字典就明白它的意思。

whether or not you would do certain things if you had the chance
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which means: something to be sure that you have got to do it,
if you had got the chance ,

that is because something is definite and with no doubt.

all right then, make sentences for you and have a look

She is absolutely certain she is going to succeed.
The train is certain to be late.

and Thank you for reading

請問上句的certain是什麼意思
指『不確定某種』.....

certain在此句的意思是 - 確信的,有把握的;當形容詞用 ，整句話的意思為: 如果有機會，無論如何你得做有把握的事。
用SURE代替certain也是可以，用 certain比較文言一點。

確鑿的,無疑的;可靠的
確信的,有把握的;一定會的


他們確信會成功。
I'm quite certain of that

ㄋ也可以去奇模的字典唷!