YOU SAID:
I have been looking for a mirror like this forever
INTO JAPANESE
こんな鏡をずっと探していた
BACK INTO ENGLISH
I've been looking for a mirror like this
INTO JAPANESE
このような鏡を探していました
BACK INTO ENGLISH
I was looking for a mirror like this
INTO JAPANESE
このような鏡を探していた
BACK INTO ENGLISH
I was looking for a mirror like this
That didn't even make that much sense in English.