The gym is closed on Sundays, it opens on Monday morning.
There is no need to add “early” since the word “morning” is already in the sentence.
Morphology the branch of grammar that deals with the forms of words and their formation, as by inflection or derivation
3rd person, because if it was first, you would be personally viewing it as a part of you, like your in it, then its not second person because that's using 'you' and again, you aren't apart of it ,so its 'they, them' which is 3rd person.<span />