English verb conjugation
MUST PRISE

Regular verb: prise - prised - prised

Affirmation

Simple form	V-ing form
I must prise you must prise he must prise we must prise you must prise they must prise	I must be prising you must be prising he must be prising we must be prising you must be prising they must be prising
Perfect	V-ing perfect
I must have prised you must have prised he must have prised we must have prised you must have prised they must have prised	I must have been prising you must have been prising he must have been prising we must have been prising you must have been prising they must have been prising

Negation

Simple form	V-ing form
I mustn't prise you mustn't prise he mustn't prise we mustn't prise you mustn't prise they mustn't prise	I mustn't be prising you mustn't be prising he mustn't be prising we mustn't be prising you mustn't be prising they mustn't be prising
Perfect	V-ing perfect
I mustn't have prised you mustn't have prised he mustn't have prised we mustn't have prised you mustn't have prised they mustn't have prised	I mustn't have been prising you mustn't have been prising he mustn't have been prising we mustn't have been prising you mustn't have been prising they mustn't have been prising

Interrogative form

Simple form	V-ing form
must I prise? must you prise? must he prise? must we prise? must you prise? must they prise?	must I be prising? must you be prising? must he be prising? must we be prising? must you be prising? must they be prising?
Perfect	V-ing perfect
must I have prised? must you have prised? must he have prised? must we have prised? must you have prised? must they have prised?	must I have been prising? must you have been prising? must he have been prising? must we have been prising? must you have been prising? must they have been prising?

Interro-negative form

Simple form	V-ing form
mustn't I prise? mustn't you prise? mustn't he prise? mustn't we prise? mustn't you prise? mustn't they prise?	mustn't I be prising? mustn't you be prising? mustn't he be prising? mustn't we be prising? mustn't you be prising? mustn't they be prising?
Perfect	V-ing perfect
mustn't I have prised? mustn't you have prised? mustn't he have prised? mustn't we have prised? mustn't you have prised? mustn't they have prised?	mustn't I have been prising? mustn't you have been prising? mustn't he have been prising? mustn't we have been prising? mustn't you have been prising? mustn't they have been prising?