"I am learning Gaelic, I need a dictionary."
Translation:Tha mi ag ionnsachadh Gàidhlig, feumaidh mi faclair.
dh’fheumadh e / am feumadh e would be the conditional/habitual past form: he would need, he used to need / would he need?, did he use to need?.
Or dh’fheumadh e / an do dh’fheumadh e? would be passive past: it was needed / was it needed?
But I don’t think these are forms that Duolingo teaches right now.