"The student does not sleep, but writes."
Translation:Discipulus non dormit, sed scribit.
habeo -> "I have" (first person singular)
habes -> "You have" (second person singular; when talking to one person)
habet -> "He/she/it has" (third person singular)
habemus -> "We have" (first person plural)
habetis -> "You have" (second person plural; when talking to more than one person)
habent -> "They have" (third person plural)
You can see a list of all the forms of habeo, habere at Wiktionary (at the current moment the Duo course only uses the present indicative active forms): https://en.wiktionary.org/wiki/habeo#Conjugation