The verbs be, do, and go are all irregular verbs in English. They are also very common in English. That’s why I’ve created the following tables to show their spelling and form changes when using them with different subjects and tenses.

Infinitivepresentsimple pastpast participle
beI am. you, we, they are.
he, she, it is.
I, he, she, it was
you, they, we were
I, you, we, they have been.
he, she, it has been.
doI, you, they, we, do.
he, she, it does.
I, you, they, we, he, she, it did.I, we, they, you have done.
he, she, it has done
goI, you, they, we, go.
he, she, it goes.
I, you, they, we, he, she, it went.I, we, they, you have gone.
he, she, it has gone.

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Affirmative sentences