English verb conjugation
MUST SPECIALISE

Regular verb: specialise - specialised - specialised

Affirmation

Simple form	V-ing form
I must specialise you must specialise he must specialise we must specialise you must specialise they must specialise	I must be specialising you must be specialising he must be specialising we must be specialising you must be specialising they must be specialising
Perfect	V-ing perfect
I must have specialised you must have specialised he must have specialised we must have specialised you must have specialised they must have specialised	I must have been specialising you must have been specialising he must have been specialising we must have been specialising you must have been specialising they must have been specialising

Negation

Simple form	V-ing form
I mustn't specialise you mustn't specialise he mustn't specialise we mustn't specialise you mustn't specialise they mustn't specialise	I mustn't be specialising you mustn't be specialising he mustn't be specialising we mustn't be specialising you mustn't be specialising they mustn't be specialising
Perfect	V-ing perfect
I mustn't have specialised you mustn't have specialised he mustn't have specialised we mustn't have specialised you mustn't have specialised they mustn't have specialised	I mustn't have been specialising you mustn't have been specialising he mustn't have been specialising we mustn't have been specialising you mustn't have been specialising they mustn't have been specialising

Interrogative form

Simple form	V-ing form
must I specialise? must you specialise? must he specialise? must we specialise? must you specialise? must they specialise?	must I be specialising? must you be specialising? must he be specialising? must we be specialising? must you be specialising? must they be specialising?
Perfect	V-ing perfect
must I have specialised? must you have specialised? must he have specialised? must we have specialised? must you have specialised? must they have specialised?	must I have been specialising? must you have been specialising? must he have been specialising? must we have been specialising? must you have been specialising? must they have been specialising?

Interro-negative form

Simple form	V-ing form
mustn't I specialise? mustn't you specialise? mustn't he specialise? mustn't we specialise? mustn't you specialise? mustn't they specialise?	mustn't I be specialising? mustn't you be specialising? mustn't he be specialising? mustn't we be specialising? mustn't you be specialising? mustn't they be specialising?
Perfect	V-ing perfect
mustn't I have specialised? mustn't you have specialised? mustn't he have specialised? mustn't we have specialised? mustn't you have specialised? mustn't they have specialised?	mustn't I have been specialising? mustn't you have been specialising? mustn't he have been specialising? mustn't we have been specialising? mustn't you have been specialising? mustn't they have been specialising?