这个句子正确吗？

The key is "being", which inicate the plan to invite workers as the guest.

If the gathering is overall, the sentence is "All the guests invited were workers".

The word "being" indicates the gathering is in the future, so the correct sentence should read as "All the guests being invited are workers".

没问题哦!

Is "All the invited guests are/ were workers?" a better answrer?

正确的说应该是All the guests ，being invited ，were workers.

没有什么问题

不过我觉得改成all the guests invited were workers.似乎更好一点，你说呢