English verb conjugation COULD RUIN

Regular verb: ruin - ruined - ruined

Affirmation

Simple form

I could ruin
you could ruin
he could ruin
we could ruin
you could ruin
they could ruin

V-ing form

I could be ruining
you could be ruining
he could be ruining
we could be ruining
you could be ruining
they could be ruining

Perfect

I could have ruined
you could have ruined
he could have ruined
we could have ruined
you could have ruined
they could have ruined

V-ing perfect

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

Negation

Simple form

I could not ruin
you could not ruin
he could not ruin
we could not ruin
you could not ruin
they could not ruin

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I ruin?
could you ruin?
could he ruin?
could we ruin?
could you ruin?
could they ruin?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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