I have a question on conjugating he/she is present. The book gives us "adest" to mean he/she is present, and according to the vocabulary in the back, the infinitive is "adesse." The translation on page 25 uses "adsunt," which means they are present. What type of conjugation is this verb? With adsunt, it looks like it would be a third conjugation, but with adest, it looks like it could be a second conjugation but it doesn't have the accented 'e' in the infinitive. Anyone want to enlighten me, because I feel like I'm missing something. Thanks!

Olivia Hattan