English verb conjugation COULD MARBLE

Regular verb: marble - marbled - marbled

Affirmation

Simple form

I could marble
you could marble
he could marble
we could marble
you could marble
they could marble

V-ing form

I could be marbling
you could be marbling
he could be marbling
we could be marbling
you could be marbling
they could be marbling

Perfect

I could have marbled
you could have marbled
he could have marbled
we could have marbled
you could have marbled
they could have marbled

V-ing perfect

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

Negation

Simple form

I could not marble
you could not marble
he could not marble
we could not marble
you could not marble
they could not marble

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I marble?
could you marble?
could he marble?
could we marble?
could you marble?
could they marble?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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