YOU SAID:

I want cake for dinner.

INTO JAPANESE

夕食にケーキをします。

BACK INTO ENGLISH

Cake for dinner.

INTO JAPANESE

夕食はケーキ。

BACK INTO ENGLISH

The dinner was a cake.

INTO JAPANESE

夕食はケーキでした。

BACK INTO ENGLISH

Dinner was a cake.

INTO JAPANESE

夕食はケーキだった。

BACK INTO ENGLISH

Dinner was a cake.