duolingo should have sections to look up vocab and conjugations
if duolingo had section for vocab and conjugations it could be an all in one resource for language learning. Spanishdict.com is good for spanish but other languages are lacking a comprehensive vocab/conjugation resource.
yes i felt the same thing during study. that's why i have made this excel file.
please check this link: https://drive.google.com/open?id=0B_JwtJm8LPQmVk5fM21QQkgyUjA