English verb conjugation
MUST EXTEMPORISE

Regular verb: extemporise - extemporised - extemporised

Affirmation

Simple form	V-ing form
I must extemporise you must extemporise he must extemporise we must extemporise you must extemporise they must extemporise	I must be extemporising you must be extemporising he must be extemporising we must be extemporising you must be extemporising they must be extemporising
Perfect	V-ing perfect
I must have extemporised you must have extemporised he must have extemporised we must have extemporised you must have extemporised they must have extemporised	I must have been extemporising you must have been extemporising he must have been extemporising we must have been extemporising you must have been extemporising they must have been extemporising

Negation

Simple form	V-ing form
I mustn't extemporise you mustn't extemporise he mustn't extemporise we mustn't extemporise you mustn't extemporise they mustn't extemporise	I mustn't be extemporising you mustn't be extemporising he mustn't be extemporising we mustn't be extemporising you mustn't be extemporising they mustn't be extemporising
Perfect	V-ing perfect
I mustn't have extemporised you mustn't have extemporised he mustn't have extemporised we mustn't have extemporised you mustn't have extemporised they mustn't have extemporised	I mustn't have been extemporising you mustn't have been extemporising he mustn't have been extemporising we mustn't have been extemporising you mustn't have been extemporising they mustn't have been extemporising

Interrogative form

Simple form	V-ing form
must I extemporise? must you extemporise? must he extemporise? must we extemporise? must you extemporise? must they extemporise?	must I be extemporising? must you be extemporising? must he be extemporising? must we be extemporising? must you be extemporising? must they be extemporising?
Perfect	V-ing perfect
must I have extemporised? must you have extemporised? must he have extemporised? must we have extemporised? must you have extemporised? must they have extemporised?	must I have been extemporising? must you have been extemporising? must he have been extemporising? must we have been extemporising? must you have been extemporising? must they have been extemporising?

Interro-negative form

Simple form	V-ing form
mustn't I extemporise? mustn't you extemporise? mustn't he extemporise? mustn't we extemporise? mustn't you extemporise? mustn't they extemporise?	mustn't I be extemporising? mustn't you be extemporising? mustn't he be extemporising? mustn't we be extemporising? mustn't you be extemporising? mustn't they be extemporising?
Perfect	V-ing perfect
mustn't I have extemporised? mustn't you have extemporised? mustn't he have extemporised? mustn't we have extemporised? mustn't you have extemporised? mustn't they have extemporised?	mustn't I have been extemporising? mustn't you have been extemporising? mustn't he have been extemporising? mustn't we have been extemporising? mustn't you have been extemporising? mustn't they have been extemporising?