Be动词的使用.If the big party weren't much fun anymore, everyone might go home. 这句用weren't much fun anymore, 为什么不用wasn't fun anymore, big party 不属于第三人称吗?

Be动词的使用.If the big party weren't much fun anymore, everyone might go home. 这句用weren't much fun anymore, 为什么不用wasn't fun anymore, big party 不属于第三人称吗?
Be动词的使用.
If the big party weren't much fun anymore, everyone might go home.

这句用weren't much fun anymore, 为什么不用wasn't fun anymore, big party 不属于第三人称吗?

Be动词的使用.If the big party weren't much fun anymore, everyone might go home. 这句用weren't much fun anymore, 为什么不用wasn't fun anymore, big party 不属于第三人称吗?
此处是虚拟语气,表示对来现在 big party 的一种假设,也就是说,此刻 the big part is much fun,每个人都在此玩儿的很愉快,但是“假如这次盛大聚会不会再有什么意思的话,那么每个人都会回家的”.
　　对现在的虚拟,主句中的谓语动词用“would + 动词原形”,if 从句用过去时态,动词 be 按要求应该用 were,口语中也有用 was 的.

这个是虚拟语气。
比如：
If I were you, I would check the dictionary.要是我是你的话，我会查字典。（我不可能是你，所以这里用的是虚拟语气）