"Duo is fast and smart."
Translation:دُوو سَريع وَذَكِيّ.
How are we supposed to learn these new words (fast/smart) if they're never shown before? I don't see a hover option either
It is most common to connect to the word, not to write independently. Some places and people do write it independently as well though.
Not a native speaker, but I guess you always can. Just like in English, where you have "Duo is smart and quick". However, that's a different sentence even when it has the same meaning.