English verb conjugation COULD DOUBLE

Regular verb: double - doubled - doubled

Affirmation

Simple form

I could double
you could double
he could double
we could double
you could double
they could double

V-ing form

I could be doubling
you could be doubling
he could be doubling
we could be doubling
you could be doubling
they could be doubling

Perfect

I could have doubled
you could have doubled
he could have doubled
we could have doubled
you could have doubled
they could have doubled

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I double?
could you double?
could he double?
could we double?
could you double?
could they double?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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