English verb conjugation COULD ALTER ALTER

Regular verb: alter alter - alter altered - alter altered

Warning, this verb may not exist. Conjugation is given as example.

Affirmation

Simple form

I could alter alter
you could alter alter
he could alter alter
we could alter alter
you could alter alter
they could alter alter

V-ing form

I could be alter altering
you could be alter altering
he could be alter altering
we could be alter altering
you could be alter altering
they could be alter altering

Perfect

I could have alter altered
you could have alter altered
he could have alter altered
we could have alter altered
you could have alter altered
they could have alter altered

V-ing perfect

I could have been alter altering
you could have been alter altering
he could have been alter altering
we could have been alter altering
you could have been alter altering
they could have been alter altering

Negation

Simple form

I could not alter alter
you could not alter alter
he could not alter alter
we could not alter alter
you could not alter alter
they could not alter alter

V-ing form

I could not be alter altering
you could not be alter altering
he could not be alter altering
we could not be alter altering
you could not be alter altering
they could not be alter altering

Perfect

I could not have alter altered
you could not have alter altered
he could not have alter altered
we could not have alter altered
you could not have alter altered
they could not have alter altered

V-ing perfect

I could not have been alter altering
you could not have been alter altering
he could not have been alter altering
we could not have been alter altering
you could not have been alter altering
they could not have been alter altering

Interrogative form

Simple form

could I alter alter?
could you alter alter?
could he alter alter?
could we alter alter?
could you alter alter?
could they alter alter?

V-ing form

could I be alter altering?
could you be alter altering?
could he be alter altering?
could we be alter altering?
could you be alter altering?
could they be alter altering?

Perfect

could I have alter altered?
could you have alter altered?
could he have alter altered?
could we have alter altered?
could you have alter altered?
could they have alter altered?

V-ing perfect

could I have been alter altering?
could you have been alter altering?
could he have been alter altering?
could we have been alter altering?
could you have been alter altering?
could they have been alter altering?

Interro-negative form

Simple form

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

V-ing form

could I not be alter altering?
could you not be alter altering?
could he not be alter altering?
could we not be alter altering?
could you not be alter altering?
could they not be alter altering?

Perfect

could I not have alter altered?
could you not have alter altered?
could he not have alter altered?
could we not have alter altered?
could you not have alter altered?
could they not have alter altered?

V-ing perfect

could I not have been alter altering?
could you not have been alter altering?
could he not have been alter altering?
could we not have been alter altering?
could you not have been alter altering?
could they not have been alter altering?

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