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 couldn't alter alter
you couldn't alter alter
he couldn't alter alter
we couldn't alter alter
you couldn't alter alter
they couldn't alter alter

V-ing form

I couldn't be alter altering
you couldn't be alter altering
he couldn't be alter altering
we couldn't be alter altering
you couldn't be alter altering
they couldn't be alter altering

Perfect

I couldn't have alter altered
you couldn't have alter altered
he couldn't have alter altered
we couldn't have alter altered
you couldn't have alter altered
they couldn't have alter altered

V-ing perfect

I couldn't have been alter altering
you couldn't have been alter altering
he couldn't have been alter altering
we couldn't have been alter altering
you couldn't have been alter altering
they couldn't 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

couldn't I alter alter?
couldn't you alter alter?
couldn't he alter alter?
couldn't we alter alter?
couldn't you alter alter?
couldn't they alter alter?

V-ing form

couldn't I be alter altering?
couldn't you be alter altering?
couldn't he be alter altering?
couldn't we be alter altering?
couldn't you be alter altering?
couldn't they be alter altering?

Perfect

couldn't I have alter altered?
couldn't you have alter altered?
couldn't he have alter altered?
couldn't we have alter altered?
couldn't you have alter altered?
couldn't they have alter altered?

V-ing perfect

couldn't I have been alter altering?
couldn't you have been alter altering?
couldn't he have been alter altering?
couldn't we have been alter altering?
couldn't you have been alter altering?
couldn't they have been alter altering?

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