Based on the sentences above, here are the different types of words used:
Proper Noun: Robert (a specific name).
Pronoun: He, They, His (replaces nouns like Robert or his wife).
Verb: lives, loves, teaches, work (action or state).
Common Noun: apartment, job, courses, mornings (general things or times).
Preposition: in (shows location or time).
Adjective: college (describes the type of courses).