English verb conjugation
MUST CONCERTISE

Regular verb: concertise - concertised - concertised

Affirmation

Simple form	V-ing form
I must concertise you must concertise he must concertise we must concertise you must concertise they must concertise	I must be concertising you must be concertising he must be concertising we must be concertising you must be concertising they must be concertising
Perfect	V-ing perfect
I must have concertised you must have concertised he must have concertised we must have concertised you must have concertised they must have concertised	I must have been concertising you must have been concertising he must have been concertising we must have been concertising you must have been concertising they must have been concertising

Negation

Simple form	V-ing form
I must not concertise you must not concertise he must not concertise we must not concertise you must not concertise they must not concertise	I must not be concertising you must not be concertising he must not be concertising we must not be concertising you must not be concertising they must not be concertising
Perfect	V-ing perfect
I must not have concertised you must not have concertised he must not have concertised we must not have concertised you must not have concertised they must not have concertised	I must not have been concertising you must not have been concertising he must not have been concertising we must not have been concertising you must not have been concertising they must not have been concertising

Interrogative form

Simple form	V-ing form
must I concertise? must you concertise? must he concertise? must we concertise? must you concertise? must they concertise?	must I be concertising? must you be concertising? must he be concertising? must we be concertising? must you be concertising? must they be concertising?
Perfect	V-ing perfect
must I have concertised? must you have concertised? must he have concertised? must we have concertised? must you have concertised? must they have concertised?	must I have been concertising? must you have been concertising? must he have been concertising? must we have been concertising? must you have been concertising? must they have been concertising?

Interro-negative form

Simple form	V-ing form
must I not concertise? must you not concertise? must he not concertise? must we not concertise? must you not concertise? must they not concertise?	must I not be concertising? must you not be concertising? must he not be concertising? must we not be concertising? must you not be concertising? must they not be concertising?
Perfect	V-ing perfect
must I not have concertised? must you not have concertised? must he not have concertised? must we not have concertised? must you not have concertised? must they not have concertised?	must I not have been concertising? must you not have been concertising? must he not have been concertising? must we not have been concertising? must you not have been concertising? must they not have been concertising?