Most of us have already known the problems(___that we discussed ____) at the meeting which will

to be discussed不定式做后置定语,同时还表示将来,可翻译为“待讨论”这种结构也等于that will be discussed,你用that we discussed时态弄错了,而且因为后面也用了定语从句which will be held tomorrow afternoon,多...可以说that we will discuss吗？可以的。语法上完全正确你是怎么看出用不定式作后置定语？the problem to be discussed 待讨论的问题这里to be discussed就是problem的定语，对problem是怎样的一个problem进行描述 还有什么不明白的，请追问，祝学习进步！