English verb conjugation COULD UNDERRUN

Irregular verb: underrun - underran - underrun

Affirmation

Simple form

I could underrun
you could underrun
he could underrun
we could underrun
you could underrun
they could underrun

V-ing form

I could be underruning
you could be underruning
he could be underruning
we could be underruning
you could be underruning
they could be underruning

Perfect

I could have underrun
you could have underrun
he could have underrun
we could have underrun
you could have underrun
they could have underrun

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I underrun?
could you underrun?
could he underrun?
could we underrun?
could you underrun?
could they underrun?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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