English verb conjugation COULD SUB

Regular verb: sub - subbed - subbed

Affirmation

Simple form

I could sub
you could sub
he could sub
we could sub
you could sub
they could sub

V-ing form

I could be subbing
you could be subbing
he could be subbing
we could be subbing
you could be subbing
they could be subbing

Perfect

I could have subbed
you could have subbed
he could have subbed
we could have subbed
you could have subbed
they could have subbed

V-ing perfect

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

Negation

Simple form

I could not sub
you could not sub
he could not sub
we could not sub
you could not sub
they could not sub

V-ing form

I could not be subbing
you could not be subbing
he could not be subbing
we could not be subbing
you could not be subbing
they could not be subbing

Perfect

I could not have subbed
you could not have subbed
he could not have subbed
we could not have subbed
you could not have subbed
they could not have subbed

V-ing perfect

I could not have been subbing
you could not have been subbing
he could not have been subbing
we could not have been subbing
you could not have been subbing
they could not have been subbing

Interrogative form

Simple form

could I sub?
could you sub?
could he sub?
could we sub?
could you sub?
could they sub?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

could I not sub?
could you not sub?
could he not sub?
could we not sub?
could you not sub?
could they not sub?

V-ing form

could I not be subbing?
could you not be subbing?
could he not be subbing?
could we not be subbing?
could you not be subbing?
could they not be subbing?

Perfect

could I not have subbed?
could you not have subbed?
could he not have subbed?
could we not have subbed?
could you not have subbed?
could they not have subbed?

V-ing perfect

could I not have been subbing?
could you not have been subbing?
could he not have been subbing?
could we not have been subbing?
could you not have been subbing?
could they not have been subbing?

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