Because these verbs change form depending on the subject in the present and past tenses, here is how each verb breaks down in practice:
1. Verb: BE
Present Simple (V1):
am (I)
is (he, she, it)
are (you, we, they)
Past Simple (V2):
was (I, he, she, it)
were (you, we, they)
Past Participle (V3): been (used with have/has/had)
2. Verb: DO
Present Simple (V1):
do (I, you, we, they)
does (he, she, it)
Past Simple (V2): did (all subjects)
Past Participle (V3): done (used with have/has/had)
3. Verb: HAVE
Present Simple (V1):
have (I, you, we, they)
has (he, she, it)
Past Simple (V2): had (all subjects)
Past Participle (V3): had (used with have/has/had)