English verb conjugation COULD BASE

Regular verb: base - based - based

Affirmation

Simple form

I could base
you could base
he could base
we could base
you could base
they could base

V-ing form

I could be basing
you could be basing
he could be basing
we could be basing
you could be basing
they could be basing

Perfect

I could have based
you could have based
he could have based
we could have based
you could have based
they could have based

V-ing perfect

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

Negation

Simple form

I could not base
you could not base
he could not base
we could not base
you could not base
they could not base

V-ing form

I could not be basing
you could not be basing
he could not be basing
we could not be basing
you could not be basing
they could not be basing

Perfect

I could not have based
you could not have based
he could not have based
we could not have based
you could not have based
they could not have based

V-ing perfect

I could not have been basing
you could not have been basing
he could not have been basing
we could not have been basing
you could not have been basing
they could not have been basing

Interrogative form

Simple form

could I base?
could you base?
could he base?
could we base?
could you base?
could they base?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

could I not base?
could you not base?
could he not base?
could we not base?
could you not base?
could they not base?

V-ing form

could I not be basing?
could you not be basing?
could he not be basing?
could we not be basing?
could you not be basing?
could they not be basing?

Perfect

could I not have based?
could you not have based?
could he not have based?
could we not have based?
could you not have based?
could they not have based?

V-ing perfect

could I not have been basing?
could you not have been basing?
could he not have been basing?
could we not have been basing?
could you not have been basing?
could they not have been basing?

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