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 couldn't ruin
you couldn't ruin
he couldn't ruin
we couldn't ruin
you couldn't ruin
they couldn't ruin

V-ing form

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

Perfect

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

V-ing perfect

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

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

V-ing form

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

Perfect

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

V-ing perfect

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

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