1.Absolute confirmation of this must be waited a few days.

答

Absolute confirmation of this must be waited a few days.

2. Absolute confirmation of this must wait a few days . 

3. Absolute confirmation of this must be waiting a few days .

 

三句的语法都有错,应该是:

Absolute confirmation for this will take a few days .

或是

You must wait for a few days for the absolute confirmation for this. 

但还是第一句较简短.

 

很希望会对你有帮助.若满意请采纳,谢谢你.

你不明白啊， “OF ” 是对的！我主要是觉得" WAIT " 为什么不是被动式而已。我想不明白。是的，也可以用of来表达，我说你错是指句子结构上的错。

若硬要用被动式的话:

Absolute confirmation of/for this must be waited for a few days.
或是
Absolute confirmation of/for this need to be waited for a few days.

但用被动式写法会较长，除非是指定要这样表达法，不然的话，
Absolute confirmation of/for this will take a few days 会比较简洁。

若果满思我的回答，请采纳，谢谢你。