I am sleepy. Are you happy?
Japanese name: Be動詞 (be doushi)
I am hungry.
You are my friend.
He is a rugby player.
The verb “to be” is quite important in English, as you can imagine. It’s one of the first grammar points taught to students in the course of formal English instruction. Unlike Japanese, it has to be conjugated depending on the subject. This can be challenging for students, but they will gradually build familiarity over many years of practice.
“Be” is also used as an auxiliary verb in many other grammar points, but this tag only applies to the basic usage of the verb.