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 couldn't marble
you couldn't marble
he couldn't marble
we couldn't marble
you couldn't marble
they couldn't marble

V-ing form

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

Perfect

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

V-ing perfect

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

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

V-ing form

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

Perfect

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

V-ing perfect

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

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