English verb conjugation COULD UNFASTEN

Regular verb: unfasten - unfastened - unfastened

Affirmation

Simple form

I could unfasten
you could unfasten
he could unfasten
we could unfasten
you could unfasten
they could unfasten

V-ing form

I could be unfastening
you could be unfastening
he could be unfastening
we could be unfastening
you could be unfastening
they could be unfastening

Perfect

I could have unfastened
you could have unfastened
he could have unfastened
we could have unfastened
you could have unfastened
they could have unfastened

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I unfasten?
could you unfasten?
could he unfasten?
could we unfasten?
could you unfasten?
could they unfasten?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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