English verb conjugation COULD BIRL

Regular verb: birl - birled - birled

Affirmation

Simple form

I could birl
you could birl
he could birl
we could birl
you could birl
they could birl

V-ing form

I could be birling
you could be birling
he could be birling
we could be birling
you could be birling
they could be birling

Perfect

I could have birled
you could have birled
he could have birled
we could have birled
you could have birled
they could have birled

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I birl?
could you birl?
could he birl?
could we birl?
could you birl?
could they birl?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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