English verb conjugation COULD RETAIN

Regular verb: retain - retained - retained

Affirmation

Simple form

I could retain
you could retain
he could retain
we could retain
you could retain
they could retain

V-ing form

I could be retaining
you could be retaining
he could be retaining
we could be retaining
you could be retaining
they could be retaining

Perfect

I could have retained
you could have retained
he could have retained
we could have retained
you could have retained
they could have retained

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I retain?
could you retain?
could he retain?
could we retain?
could you retain?
could they retain?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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