I didn't eat anything
I didn't eat anything yesterday.
Não comi nada nos últimos três dias.
I haven't eaten anything for the last three days.
I haven't eaten anything today yet.
Não comi nada desde ontem de manhã.
I haven't eaten anything since yesterday morning.
I didn't eat anything.
I haven't eaten anything all day.
I haven't eaten anything yet.
Desde o ano passado não comi nada.
I haven't eaten anything since last year.
— Ирония судьбы, или С легким паром! (1976)