doesnt datta mean was?

yes, or 'were' as 'datta' can also be plural.

Mnhm?! だった is only a notation of past events or events that could have passed had they, uh, passed. But singularity/plurality is in no way present here, as it is in no way present in most of the utterances from this wretched language. :rolleyes:

example:

私は綺麗だった。

I beautiful was

彼らは綺麗だった。

They beautiful where

Hrm, you just introduced singularity/plurality via ら -- that has nothing to do with the copula that is the topic of discussion here. Unless I missed something somewhere...

I think I slightly missformulated it. With saying 'datta' can be plural, I merely want to say it can be used together with plural nouns as stated in my example.

Sorry for the missunderstanding, but I see why you got confused.

Ah, I see. Sorry about that! :vsign: