English verb conjugation CAN ERR

Regular verb: err - erred - erred

Affirmation

Simple form

I can err
you can err
she can err
we can err
you can err
they can err

V-ing form

I can be erring
you can be erring
she can be erring
we can be erring
you can be erring
they can be erring

Perfect

I can have erred
you can have erred
she can have erred
we can have erred
you can have erred
they can have erred

V-ing perfect

I can have been erring
you can have been erring
she can have been erring
we can have been erring
you can have been erring
they can have been erring

Negation

Simple form

I cannot err
you cannot err
she cannot err
we cannot err
you cannot err
they cannot err

V-ing form

I cannot be erring
you cannot be erring
she cannot be erring
we cannot be erring
you cannot be erring
they cannot be erring

Perfect

I cannot have erred
you cannot have erred
she cannot have erred
we cannot have erred
you cannot have erred
they cannot have erred

V-ing perfect

I cannot have been erring
you cannot have been erring
she cannot have been erring
we cannot have been erring
you cannot have been erring
they cannot have been erring

Interrogative form

Simple form

can I err?
can you err?
can she err?
can we err?
can you err?
can they err?

V-ing form

can I be erring?
can you be erring?
can she be erring?
can we be erring?
can you be erring?
can they be erring?

Perfect

can I have erred?
can you have erred?
can she have erred?
can we have erred?
can you have erred?
can they have erred?

V-ing perfect

can I have been erring?
can you have been erring?
can she have been erring?
can we have been erring?
can you have been erring?
can they have been erring?

Interro-negative form

Simple form

can I not err?
can you not err?
can she not err?
can we not err?
can you not err?
can they not err?

V-ing form

can I not be erring?
can you not be erring?
can she not be erring?
can we not be erring?
can you not be erring?
can they not be erring?

Perfect

can I not have erred?
can you not have erred?
can she not have erred?
can we not have erred?
can you not have erred?
can they not have erred?

V-ing perfect

can I not have been erring?
can you not have been erring?
can she not have been erring?
can we not have been erring?
can you not have been erring?
can they not have been erring?

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