YOU SAID:

I had lettuce for breakfast .

INTO JAPANESE

朝食にレタスを持っていた。

BACK INTO ENGLISH

Breakfast had lettuce.

INTO JAPANESE

朝食はレタスを持っていた。

BACK INTO ENGLISH

Breakfast had a lettuce.

INTO JAPANESE

朝食はレタスを持っていた。

BACK INTO ENGLISH

Breakfast had a lettuce.