English verb conjugation COULD RUIN

Regular verb: ruin - ruined - ruined

Affirmation

Simple form

I could ruin
you could ruin
she could ruin
we could ruin
you could ruin
they could ruin

V-ing form

I could be ruining
you could be ruining
she could be ruining
we could be ruining
you could be ruining
they could be ruining

Perfect

I could have ruined
you could have ruined
she 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
she 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
she 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
she 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
she 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
she 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 she ruin?
could we ruin?
could you ruin?
could they ruin?

V-ing form

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

Perfect

could I have ruined?
could you have ruined?
could she 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 she 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 she 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 she 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 she 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 she 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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