English verb conjugation COULD DOFF

Regular verb: doff - doffed - doffed

Affirmation

Simple form

I could doff
you could doff
he could doff
we could doff
you could doff
they could doff

V-ing form

I could be doffing
you could be doffing
he could be doffing
we could be doffing
you could be doffing
they could be doffing

Perfect

I could have doffed
you could have doffed
he could have doffed
we could have doffed
you could have doffed
they could have doffed

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I doff?
could you doff?
could he doff?
could we doff?
could you doff?
could they doff?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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