English verb conjugation MUST RUIN

Regular verb: ruin - ruined - ruined

Affirmation

Simple form

I must ruin
you must ruin
he must ruin
we must ruin
you must ruin
they must ruin

V-ing form

I must be ruining
you must be ruining
he must be ruining
we must be ruining
you must be ruining
they must be ruining

Perfect

I must have ruined
you must have ruined
he must have ruined
we must have ruined
you must have ruined
they must have ruined

V-ing perfect

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

Negation

Simple form

I must not ruin
you must not ruin
he must not ruin
we must not ruin
you must not ruin
they must not ruin

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I ruin?
must you ruin?
must he ruin?
must we ruin?
must you ruin?
must they ruin?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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