English verb conjugation COULD COST

Irregular verb: cost - cost - cost

Affirmation

Simple form

I could cost
you could cost
he could cost
we could cost
you could cost
they could cost

V-ing form

I could be costing
you could be costing
he could be costing
we could be costing
you could be costing
they could be costing

Perfect

I could have cost
you could have cost
he could have cost
we could have cost
you could have cost
they could have cost

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I cost?
could you cost?
could he cost?
could we cost?
could you cost?
could they cost?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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