English verb conjugation COULD TESTIFY

Regular verb: testify - testified - testified

Affirmation

Simple form

I could testify
you could testify
he could testify
we could testify
you could testify
they could testify

V-ing form

I could be testifying
you could be testifying
he could be testifying
we could be testifying
you could be testifying
they could be testifying

Perfect

I could have testified
you could have testified
he could have testified
we could have testified
you could have testified
they could have testified

V-ing perfect

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

Negation

Simple form

I couldn't testify
you couldn't testify
he couldn't testify
we couldn't testify
you couldn't testify
they couldn't testify

V-ing form

I couldn't be testifying
you couldn't be testifying
he couldn't be testifying
we couldn't be testifying
you couldn't be testifying
they couldn't be testifying

Perfect

I couldn't have testified
you couldn't have testified
he couldn't have testified
we couldn't have testified
you couldn't have testified
they couldn't have testified

V-ing perfect

I couldn't have been testifying
you couldn't have been testifying
he couldn't have been testifying
we couldn't have been testifying
you couldn't have been testifying
they couldn't have been testifying

Interrogative form

Simple form

could I testify?
could you testify?
could he testify?
could we testify?
could you testify?
could they testify?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

couldn't I testify?
couldn't you testify?
couldn't he testify?
couldn't we testify?
couldn't you testify?
couldn't they testify?

V-ing form

couldn't I be testifying?
couldn't you be testifying?
couldn't he be testifying?
couldn't we be testifying?
couldn't you be testifying?
couldn't they be testifying?

Perfect

couldn't I have testified?
couldn't you have testified?
couldn't he have testified?
couldn't we have testified?
couldn't you have testified?
couldn't they have testified?

V-ing perfect

couldn't I have been testifying?
couldn't you have been testifying?
couldn't he have been testifying?
couldn't we have been testifying?
couldn't you have been testifying?
couldn't they have been testifying?

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