English verb conjugation COULD CHECKER

Regular verb: checker - checkered - checkered

Affirmation

Simple form

I could checker
you could checker
he could checker
we could checker
you could checker
they could checker

V-ing form

I could be checkering
you could be checkering
he could be checkering
we could be checkering
you could be checkering
they could be checkering

Perfect

I could have checkered
you could have checkered
he could have checkered
we could have checkered
you could have checkered
they could have checkered

V-ing perfect

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

Negation

Simple form

I could not checker
you could not checker
he could not checker
we could not checker
you could not checker
they could not checker

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I checker?
could you checker?
could he checker?
could we checker?
could you checker?
could they checker?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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