Questions & Answers about Σήμερα δεν έφαγα κανονικό πρωινό.
Σήμερα means today.
It does not have to come first, but putting it first is very natural when the speaker wants to set the time right away:
- Σήμερα δεν έφαγα κανονικό πρωινό. = Today I didn’t eat a proper breakfast.
- Δεν έφαγα κανονικό πρωινό σήμερα. = I didn’t eat a proper breakfast today.
Both are correct. The position mostly affects emphasis, not the basic meaning.
Δεν is the basic Greek word for not in statements.
In Greek, δεν normally goes directly before the verb:
- δεν έφαγα = I did not eat
So the structure is very similar to English not + verb idea, although Greek does not need a separate helping verb like did.