English verb conjugation COULD CHANGE

Regular verb: change - changed - changed

Affirmation

Simple form

I could change
you could change
he could change
we could change
you could change
they could change

V-ing form

I could be changing
you could be changing
he could be changing
we could be changing
you could be changing
they could be changing

Perfect

I could have changed
you could have changed
he could have changed
we could have changed
you could have changed
they could have changed

V-ing perfect

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

Negation

Simple form

I could not change
you could not change
he could not change
we could not change
you could not change
they could not change

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I change?
could you change?
could he change?
could we change?
could you change?
could they change?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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