English verb conjugation MUST UNDERSTEER

Regular verb: understeer - understeered - understeered

Affirmation

Simple form

I must understeer
you must understeer
he must understeer
we must understeer
you must understeer
they must understeer

V-ing form

I must be understeering
you must be understeering
he must be understeering
we must be understeering
you must be understeering
they must be understeering

Perfect

I must have understeered
you must have understeered
he must have understeered
we must have understeered
you must have understeered
they must have understeered

V-ing perfect

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

Negation

Simple form

I mustn't understeer
you mustn't understeer
he mustn't understeer
we mustn't understeer
you mustn't understeer
they mustn't understeer

V-ing form

I mustn't be understeering
you mustn't be understeering
he mustn't be understeering
we mustn't be understeering
you mustn't be understeering
they mustn't be understeering

Perfect

I mustn't have understeered
you mustn't have understeered
he mustn't have understeered
we mustn't have understeered
you mustn't have understeered
they mustn't have understeered

V-ing perfect

I mustn't have been understeering
you mustn't have been understeering
he mustn't have been understeering
we mustn't have been understeering
you mustn't have been understeering
they mustn't have been understeering

Interrogative form

Simple form

must I understeer?
must you understeer?
must he understeer?
must we understeer?
must you understeer?
must they understeer?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

mustn't I understeer?
mustn't you understeer?
mustn't he understeer?
mustn't we understeer?
mustn't you understeer?
mustn't they understeer?

V-ing form

mustn't I be understeering?
mustn't you be understeering?
mustn't he be understeering?
mustn't we be understeering?
mustn't you be understeering?
mustn't they be understeering?

Perfect

mustn't I have understeered?
mustn't you have understeered?
mustn't he have understeered?
mustn't we have understeered?
mustn't you have understeered?
mustn't they have understeered?

V-ing perfect

mustn't I have been understeering?
mustn't you have been understeering?
mustn't he have been understeering?
mustn't we have been understeering?
mustn't you have been understeering?
mustn't they have been understeering?

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