YOU SAID:

i knew the smell of smoke would hang around this long

INTO JAPANESE

煙の匂いがこんなに長く垂れ下がるのは分かっていた

BACK INTO ENGLISH

I knew that the smell of smoke would hang down so long

INTO JAPANESE

煙の匂いがずっと続くことはわかっていました

BACK INTO ENGLISH

I knew that the smell of smoke would last forever

INTO JAPANESE

煙の匂いが永遠に続くことを私は知っていました

BACK INTO ENGLISH

I knew that the smell of smoke would last forever