YOU SAID:
I wanted to sleep but I couldn't do it
INTO JAPANESE
私は眠りたかったのですが、できませんでした
BACK INTO ENGLISH
I wanted to sleep but couldn't
INTO JAPANESE
眠りたかったが、できなかった
BACK INTO ENGLISH
Wanted to sleep but couldn't
INTO JAPANESE
眠りたかったが、できなかった
BACK INTO ENGLISH
Wanted to sleep but couldn't
That didn't even make that much sense in English.