[Excerpt below taken from talkenglish.com]
The verb "to be" is different from other verbs in English. "Be verbs" do not show an action. "Be verbs" show a state of being. They act like an equals sign (=) in math.
"Be verbs" are usually followed by a noun or an adjective. A noun is a person, place, thing, or thing. An adjective is a word that describes a noun like big, small, happy, fast, interesting, and annoying.
Simple present tense "be verbs" are - am, is, are. "Be verbs" go after the subject. Use this pattern with "be verbs":
Subject + be verb + noun/adjective
To read more about the "be" verb, click here.
To practice using the "be" verb, click on the exercises below:
To practice more, you can find other exercises at this link: https://agendaweb.org/verbs/to-be-exercises.html
My name is Craig, and I've been teaching English for many years. I initially created this site for my students, but all English learners are welcome. I hope you find something helpful to you. Feel free to leave suggestions or ideas in the Comments section under any entry.