YOU SAID:

I wish I was not so sleepy most of the time

INTO JAPANESE

たいていそんなに眠くなかったらいいのに

BACK INTO ENGLISH

I wish I wasn't so sleepy most of the time

INTO JAPANESE

ほとんどの時間、そんなに眠くなければよかったのに

BACK INTO ENGLISH

I wish I wasn't so sleepy most of the time