—>Apart is an adverb (word describing a verb) meaning ‘separated’ or ‘at a distance from another.’
Examples: The couple hated being apart. A robot was taken apart for study. Joe and Jill were five feet apart.
—>In conjunction with ‘from,’ apart can also mean ‘other than’ or ‘separate from.’
Example: Apart from sounding nervous, the speech went well.
—>‘A part’ is a phrase meaning ‘to be joined with,’ ‘a portion of,’ or ‘a member of.’
Examples: A part of his heart was with her. Joe’s anxiety was only a part of the problem. To be a part of the group, you must fill out this form.