YOU SAID:

i just had the biggest yawn

INTO JAPANESE

私はちょうど最大のあくびをしました

BACK INTO ENGLISH

I just yawned the biggest

INTO JAPANESE

私はちょうど最大をあくびました

BACK INTO ENGLISH

I just shouted the maximum

INTO JAPANESE

私はちょうど最大を叫んだ

BACK INTO ENGLISH

I just shouted the maximum