YOU SAID:

I warned you I don’t want spaghetti again

INTO JAPANESE

二度とスパゲッティはいらないと警告しました

BACK INTO ENGLISH

I warned you never to have spaghetti again.

INTO JAPANESE

二度とスパゲッティを食べるなと警告した

BACK INTO ENGLISH

I warned you never to eat spaghetti again.

INTO JAPANESE

二度とスパゲッティを食べないようにと警告した。

BACK INTO ENGLISH

I warned you never to eat spaghetti again.