English verb conjugation COULD USE

Regular verb: use - used - used

Affirmation

Simple form

I could use
you could use
he could use
we could use
you could use
they could use

V-ing form

I could be using
you could be using
he could be using
we could be using
you could be using
they could be using

Perfect

I could have used
you could have used
he could have used
we could have used
you could have used
they could have used

V-ing perfect

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

Negation

Simple form

I could not use
you could not use
he could not use
we could not use
you could not use
they could not use

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I use?
could you use?
could he use?
could we use?
could you use?
could they use?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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