English verb conjugation
MUST THEORISE

Regular verb: theorise - theorised - theorised

Affirmation

Simple form	V-ing form
I must theorise you must theorise he must theorise we must theorise you must theorise they must theorise	I must be theorising you must be theorising he must be theorising we must be theorising you must be theorising they must be theorising
Perfect	V-ing perfect
I must have theorised you must have theorised he must have theorised we must have theorised you must have theorised they must have theorised	I must have been theorising you must have been theorising he must have been theorising we must have been theorising you must have been theorising they must have been theorising

Negation

Simple form	V-ing form
I mustn't theorise you mustn't theorise he mustn't theorise we mustn't theorise you mustn't theorise they mustn't theorise	I mustn't be theorising you mustn't be theorising he mustn't be theorising we mustn't be theorising you mustn't be theorising they mustn't be theorising
Perfect	V-ing perfect
I mustn't have theorised you mustn't have theorised he mustn't have theorised we mustn't have theorised you mustn't have theorised they mustn't have theorised	I mustn't have been theorising you mustn't have been theorising he mustn't have been theorising we mustn't have been theorising you mustn't have been theorising they mustn't have been theorising

Interrogative form

Simple form	V-ing form
must I theorise? must you theorise? must he theorise? must we theorise? must you theorise? must they theorise?	must I be theorising? must you be theorising? must he be theorising? must we be theorising? must you be theorising? must they be theorising?
Perfect	V-ing perfect
must I have theorised? must you have theorised? must he have theorised? must we have theorised? must you have theorised? must they have theorised?	must I have been theorising? must you have been theorising? must he have been theorising? must we have been theorising? must you have been theorising? must they have been theorising?

Interro-negative form

Simple form	V-ing form
mustn't I theorise? mustn't you theorise? mustn't he theorise? mustn't we theorise? mustn't you theorise? mustn't they theorise?	mustn't I be theorising? mustn't you be theorising? mustn't he be theorising? mustn't we be theorising? mustn't you be theorising? mustn't they be theorising?
Perfect	V-ing perfect
mustn't I have theorised? mustn't you have theorised? mustn't he have theorised? mustn't we have theorised? mustn't you have theorised? mustn't they have theorised?	mustn't I have been theorising? mustn't you have been theorising? mustn't he have been theorising? mustn't we have been theorising? mustn't you have been theorising? mustn't they have been theorising?