English verb conjugation MUST YOWL

Regular verb: yowl - yowled - yowled

Affirmation

Simple form

I must yowl
you must yowl
he must yowl
we must yowl
you must yowl
they must yowl

V-ing form

I must be yowling
you must be yowling
he must be yowling
we must be yowling
you must be yowling
they must be yowling

Perfect

I must have yowled
you must have yowled
he must have yowled
we must have yowled
you must have yowled
they must have yowled

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I yowl?
must you yowl?
must he yowl?
must we yowl?
must you yowl?
must they yowl?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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