English verb conjugation COULD UNPIN

Regular verb: unpin - unpinned - unpinned

Affirmation

Simple form

I could unpin
you could unpin
he could unpin
we could unpin
you could unpin
they could unpin

V-ing form

I could be unpinning
you could be unpinning
he could be unpinning
we could be unpinning
you could be unpinning
they could be unpinning

Perfect

I could have unpinned
you could have unpinned
he could have unpinned
we could have unpinned
you could have unpinned
they could have unpinned

V-ing perfect

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

Negation

Simple form

I could not unpin
you could not unpin
he could not unpin
we could not unpin
you could not unpin
they could not unpin

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I unpin?
could you unpin?
could he unpin?
could we unpin?
could you unpin?
could they unpin?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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