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 could not unfasten
you could not unfasten
he could not unfasten
we could not unfasten
you could not unfasten
they could not unfasten

V-ing form

I could not be unfastening
you could not be unfastening
he could not be unfastening
we could not be unfastening
you could not be unfastening
they could not be unfastening

Perfect

I could not have unfastened
you could not have unfastened
he could not have unfastened
we could not have unfastened
you could not have unfastened
they could not have unfastened

V-ing perfect

I could not have been unfastening
you could not have been unfastening
he could not have been unfastening
we could not have been unfastening
you could not have been unfastening
they could not 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

could I not unfasten?
could you not unfasten?
could he not unfasten?
could we not unfasten?
could you not unfasten?
could they not unfasten?

V-ing form

could I not be unfastening?
could you not be unfastening?
could he not be unfastening?
could we not be unfastening?
could you not be unfastening?
could they not be unfastening?

Perfect

could I not have unfastened?
could you not have unfastened?
could he not have unfastened?
could we not have unfastened?
could you not have unfastened?
could they not have unfastened?

V-ing perfect

could I not have been unfastening?
could you not have been unfastening?
could he not have been unfastening?
could we not have been unfastening?
could you not have been unfastening?
could they not have been unfastening?

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