English verb conjugation
MUST POLKA

Regular verb: polka - polkaed - polkaed

Affirmation

Simple form	V-ing form
I must polka you must polka he must polka we must polka you must polka they must polka	I must be polkaing you must be polkaing he must be polkaing we must be polkaing you must be polkaing they must be polkaing
Perfect	V-ing perfect
I must have polkaed you must have polkaed he must have polkaed we must have polkaed you must have polkaed they must have polkaed	I must have been polkaing you must have been polkaing he must have been polkaing we must have been polkaing you must have been polkaing they must have been polkaing

Negation

Simple form	V-ing form
I mustn't polka you mustn't polka he mustn't polka we mustn't polka you mustn't polka they mustn't polka	I mustn't be polkaing you mustn't be polkaing he mustn't be polkaing we mustn't be polkaing you mustn't be polkaing they mustn't be polkaing
Perfect	V-ing perfect
I mustn't have polkaed you mustn't have polkaed he mustn't have polkaed we mustn't have polkaed you mustn't have polkaed they mustn't have polkaed	I mustn't have been polkaing you mustn't have been polkaing he mustn't have been polkaing we mustn't have been polkaing you mustn't have been polkaing they mustn't have been polkaing

Interrogative form

Simple form	V-ing form
must I polka? must you polka? must he polka? must we polka? must you polka? must they polka?	must I be polkaing? must you be polkaing? must he be polkaing? must we be polkaing? must you be polkaing? must they be polkaing?
Perfect	V-ing perfect
must I have polkaed? must you have polkaed? must he have polkaed? must we have polkaed? must you have polkaed? must they have polkaed?	must I have been polkaing? must you have been polkaing? must he have been polkaing? must we have been polkaing? must you have been polkaing? must they have been polkaing?

Interro-negative form

Simple form	V-ing form
mustn't I polka? mustn't you polka? mustn't he polka? mustn't we polka? mustn't you polka? mustn't they polka?	mustn't I be polkaing? mustn't you be polkaing? mustn't he be polkaing? mustn't we be polkaing? mustn't you be polkaing? mustn't they be polkaing?
Perfect	V-ing perfect
mustn't I have polkaed? mustn't you have polkaed? mustn't he have polkaed? mustn't we have polkaed? mustn't you have polkaed? mustn't they have polkaed?	mustn't I have been polkaing? mustn't you have been polkaing? mustn't he have been polkaing? mustn't we have been polkaing? mustn't you have been polkaing? mustn't they have been polkaing?