English verb conjugation CAN TESTIFY

Regular verb: testify - testified - testified

Affirmation

Simple form

I can testify
you can testify
he can testify
we can testify
you can testify
they can testify

V-ing form

I can be testifying
you can be testifying
he can be testifying
we can be testifying
you can be testifying
they can be testifying

Perfect

I can have testified
you can have testified
he can have testified
we can have testified
you can have testified
they can have testified

V-ing perfect

I can have been testifying
you can have been testifying
he can have been testifying
we can have been testifying
you can have been testifying
they can have been testifying

Negation

Simple form

I cannot testify
you cannot testify
he cannot testify
we cannot testify
you cannot testify
they cannot testify

V-ing form

I cannot be testifying
you cannot be testifying
he cannot be testifying
we cannot be testifying
you cannot be testifying
they cannot be testifying

Perfect

I cannot have testified
you cannot have testified
he cannot have testified
we cannot have testified
you cannot have testified
they cannot have testified

V-ing perfect

I cannot have been testifying
you cannot have been testifying
he cannot have been testifying
we cannot have been testifying
you cannot have been testifying
they cannot have been testifying

Interrogative form

Simple form

can I testify?
can you testify?
can he testify?
can we testify?
can you testify?
can they testify?

V-ing form

can I be testifying?
can you be testifying?
can he be testifying?
can we be testifying?
can you be testifying?
can they be testifying?

Perfect

can I have testified?
can you have testified?
can he have testified?
can we have testified?
can you have testified?
can they have testified?

V-ing perfect

can I have been testifying?
can you have been testifying?
can he have been testifying?
can we have been testifying?
can you have been testifying?
can they have been testifying?

Interro-negative form

Simple form

can I not testify?
can you not testify?
can he not testify?
can we not testify?
can you not testify?
can they not testify?

V-ing form

can I not be testifying?
can you not be testifying?
can he not be testifying?
can we not be testifying?
can you not be testifying?
can they not be testifying?

Perfect

can I not have testified?
can you not have testified?
can he not have testified?
can we not have testified?
can you not have testified?
can they not have testified?

V-ing perfect

can I not have been testifying?
can you not have been testifying?
can he not have been testifying?
can we not have been testifying?
can you not have been testifying?
can they not have been testifying?

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