English verb conjugation COULD NAIL

Regular verb: nail - nailed - nailed

Affirmation

Simple form

I could nail
you could nail
he could nail
we could nail
you could nail
they could nail

V-ing form

I could be nailing
you could be nailing
he could be nailing
we could be nailing
you could be nailing
they could be nailing

Perfect

I could have nailed
you could have nailed
he could have nailed
we could have nailed
you could have nailed
they could have nailed

V-ing perfect

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

Negation

Simple form

I could not nail
you could not nail
he could not nail
we could not nail
you could not nail
they could not nail

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I nail?
could you nail?
could he nail?
could we nail?
could you nail?
could they nail?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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