YOU SAID:

i like the day i heard the teacher yawn

INTO JAPANESE

私は先生があくびを聞いた日が好きです

BACK INTO ENGLISH

I like the day when the teacher heard the yaying.

INTO JAPANESE

私は先生があしらう音を聞いた日が好きです。

BACK INTO ENGLISH

I like the day when I heard the teacher's sound.

INTO JAPANESE

私は先生の音を聞いた日が好きです。

BACK INTO ENGLISH

I like the day when I heard the teacher's sound.