Parts of Speech - Verbs
Most verbs are action words. Verbs can also indicate mental actions.
Every sentence needs a verb, to be a sentence.
There are also linking verbs. The most common linking verbs are is, am, are, will be, was, has been, have been, and so on. Tip: Usually if you can substitute a form of the words to be, and the sentence still makes sense, you have a linking verb. (A linking verb can also be an action verb, depending on context.)
The tense of a verb tells you when the action took place. Verbs are the only parts of speech with tense. These are the tenses: present, past, further, present perfect, past perfect, future perfect. The helping verbs specify the tenses. Helping verbs are words like will, have, and have beeen.
This is all very opaque as far as I’m concerned, just remember this. You can tell if a word is a verb by putting the word to in front of it. Here are some examples, to jump, to think, to be, to study, to allow.
Good luck, Grammar is like computer programming… there are a LOT of rules to follow!