This little Tid-Bit of English Usage is one that comes up a lot in English classes a lot. The difference between the use of this Verb and it’s related comparative Phrasal-Verb is really quite simple.
Now Let’s See Them Both In Action Together
(“crazy” is an Adjective, “whacked-out lunatic” is a Phrasal-Noun. & “insane” is an Adjective, and “he’s having some problems” is a clause where-in the Verb is changed into a Gerund and thus, functions as a Noun-Phrase)
And That’s That!
Pretty Simple Right? Well, that’s the way it should be.
Have An Excellent Day!