English verb conjugation COULD SUBTRACT

Regular verb: subtract - subtracted - subtracted

Affirmation

Simple form

I could subtract
you could subtract
he could subtract
we could subtract
you could subtract
they could subtract

V-ing form

I could be subtracting
you could be subtracting
he could be subtracting
we could be subtracting
you could be subtracting
they could be subtracting

Perfect

I could have subtracted
you could have subtracted
he could have subtracted
we could have subtracted
you could have subtracted
they could have subtracted

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I subtract?
could you subtract?
could he subtract?
could we subtract?
could you subtract?
could they subtract?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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