English verb conjugation COULD CHECKMATE

Regular verb: checkmate - checkmated - checkmated

Affirmation

Simple form

I could checkmate
you could checkmate
he could checkmate
we could checkmate
you could checkmate
they could checkmate

V-ing form

I could be checkmating
you could be checkmating
he could be checkmating
we could be checkmating
you could be checkmating
they could be checkmating

Perfect

I could have checkmated
you could have checkmated
he could have checkmated
we could have checkmated
you could have checkmated
they could have checkmated

V-ing perfect

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

Negation

Simple form

I couldn't checkmate
you couldn't checkmate
he couldn't checkmate
we couldn't checkmate
you couldn't checkmate
they couldn't checkmate

V-ing form

I couldn't be checkmating
you couldn't be checkmating
he couldn't be checkmating
we couldn't be checkmating
you couldn't be checkmating
they couldn't be checkmating

Perfect

I couldn't have checkmated
you couldn't have checkmated
he couldn't have checkmated
we couldn't have checkmated
you couldn't have checkmated
they couldn't have checkmated

V-ing perfect

I couldn't have been checkmating
you couldn't have been checkmating
he couldn't have been checkmating
we couldn't have been checkmating
you couldn't have been checkmating
they couldn't have been checkmating

Interrogative form

Simple form

could I checkmate?
could you checkmate?
could he checkmate?
could we checkmate?
could you checkmate?
could they checkmate?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

couldn't I be checkmating?
couldn't you be checkmating?
couldn't he be checkmating?
couldn't we be checkmating?
couldn't you be checkmating?
couldn't they be checkmating?

Perfect

couldn't I have checkmated?
couldn't you have checkmated?
couldn't he have checkmated?
couldn't we have checkmated?
couldn't you have checkmated?
couldn't they have checkmated?

V-ing perfect

couldn't I have been checkmating?
couldn't you have been checkmating?
couldn't he have been checkmating?
couldn't we have been checkmating?
couldn't you have been checkmating?
couldn't they have been checkmating?

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