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 couldn't base
you couldn't base
he couldn't base
we couldn't base
you couldn't base
they couldn't base

V-ing form

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

Perfect

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

V-ing perfect

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

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

V-ing form

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

Perfect

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

V-ing perfect

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

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