YOU SAID:

I ate pizza for lunch

INTO JAPANESE

昼食にピザを食べた

BACK INTO ENGLISH

I had pizza for lunch.

INTO JAPANESE

ランチにピザを食べた。

BACK INTO ENGLISH

For lunch I ate pizza.

INTO JAPANESE

ランチにピザが食べた

BACK INTO ENGLISH

Eat pizza for lunch

INTO JAPANESE

昼食にピザを食べる

BACK INTO ENGLISH

Eat pizza for lunch