English verb conjugation COULD DOUBLE

Regular verb: double - doubled - doubled

Affirmation

Simple form

I could double
you could double
she could double
we could double
you could double
they could double

V-ing form

I could be doubling
you could be doubling
she could be doubling
we could be doubling
you could be doubling
they could be doubling

Perfect

I could have doubled
you could have doubled
she 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
she 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
she 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
she 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
she 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
she 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 she double?
could we double?
could you double?
could they double?

V-ing form

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

Perfect

could I have doubled?
could you have doubled?
could she 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 she 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 she 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 she 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 she 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 she 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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