What's a verb?
what's an action verb?
Example- Potato chips crunch too loudly to eat during an exam.
crunch is something we can do... we can crunch on popcorn during a movie, we can crunch numbers in math class. In the first sentence, crunch is what potato chips do, so we can call that a verb. Even though crunch is a verb, it can be a noun.
What's a linking verb?
Example- Kelly is a shopaholic.
Ising isn't something that Kelly can do. Is connects the subject, Kelly, additional information about her, that she will soon have a huge credit card bill to pay.
What's an auxiliary verb?
example- I am Standing.
The auxiliary verb am will come only with I.
note that you can't am, this reminds you that they are not action verbs.
Be, have, and do, are the most common auxiliary verbs. Other common auxiliary verbs are could, can, should, would, may, and might.