"Hatujala mayai"

[AndyCole9]

How would you say 'we have not eaten THE eggs'? Would it not also be 'hatujala mayai'.

[AGreatUserName]

Yep. It should accept that here and I'd regard that as the most logical translation of this contextless sentence.

If someone says "We have not eaten eggs", I might assume they mean ever, and in Swahili, for that, you can say Hatujawahi kula mayai.

[adilalibra1]

I think that you can add object infix "YA" here: hatujaYAla mayai.

[AGreatUserName]

You can, but you don't need to.

[vitoreiji]

What is this -ja- particle?

[Catriona28475]

It is the negative of the perfect tense marker "-me-". So:
"Tu-me-..." = "We have ..."
"Hatu-ja-..." = "We have not ..."