YOU SAID:

I am unable to smell red roses.

INTO JAPANESE

赤いバラの香りを嗅ぐことができません。

BACK INTO ENGLISH

I can't smell the red roses.

INTO JAPANESE

赤いバラの香りはしません。

BACK INTO ENGLISH

It doesn't smell like red roses.

INTO JAPANESE

赤いバラのような香りはしません。

BACK INTO ENGLISH

It doesn't smell like red roses.