come up clear upThe question has not come up yet .The problem has not been cleared up yet .为什么一个被动一个不被动?

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come up clear upThe question has not come up yet .The problem has not been cleared up yet .为什么一个被动一个不被动?
come up clear up
The question has not come up yet .The problem has not been cleared up yet .为什么一个被动一个不被动?

come up clear upThe question has not come up yet .The problem has not been cleared up yet .为什么一个被动一个不被动?
The question has not come up yet
译：此问题还未发生.（主语就是the question,不需要用被动语态）
The problem has not been cleared up yet
译：此问题还未解决（查清）.（一个问题需要解决或查清,肯定不是这个问题自己查清或解决.它需要“某个人"或其它来解决查清此事.这就是被动语态,此句强调这个问题还没有被解决,至于谁没有解决查清此事,都不重要.

其实那两个都是不被动啊

第一个是问题还没出现.
第二个是问题还没有解决,澄清.

come up 就是物做主语 sb come up with sth

come up
1. 开始;发生
I'll let him know if anything comes up.
如有什么事,我会告诉他的。
2. 被提出,被讨论
A number of questions came up at the meeting.
会议上提出了许多问题。
3. 走过来
She came up and said,...

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come up
1. 开始;发生
I'll let him know if anything comes up.
如有什么事,我会告诉他的。
2. 被提出,被讨论
A number of questions came up at the meeting.
会议上提出了许多问题。
3. 走过来
She came up and said, "Glad to meet you."
她走过来说,"很高兴见到你。"
4. 开始流行
我列举出了come up的所有解释，请楼主仔细看解释2 come up本事就又被动了所以就不用被动了。如果楼主没法理解那我们换个角度，come up的主要意思事发生，想一下所有关于发生的词happen,take place等等不是都没有被动么？你可以把这类次当成是固定用法，主动表被动。。
第一句的意思是问题还没有被解决。
第二句的意思也是问题还没有被解决。
clear up遵循平常的语态规律所以使用被动了。

收起

1 这个问题还没有发生。
2 这个问题还没有被弄清楚。
看了翻译，是不是知道为什么一个被动一个不被动了麽？
提一下。句2是完成时的被动语态。

问题仍然还没有发生
这个问题还没有被弄清楚

翻译：问题还没有发生，问题已经被解决了。
举例：你的翻译证明是错误的。
Your translation turn out to be wrong. ->It turn out to be wrong..

可能是come没被动语态的用法。

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