English verb conjugation
MUST DESULFERISE

Regular verb: desulferise - desulferised - desulferised

Affirmation

Simple form	V-ing form
I must desulferise you must desulferise he must desulferise we must desulferise you must desulferise they must desulferise	I must be desulferising you must be desulferising he must be desulferising we must be desulferising you must be desulferising they must be desulferising
Perfect	V-ing perfect
I must have desulferised you must have desulferised he must have desulferised we must have desulferised you must have desulferised they must have desulferised	I must have been desulferising you must have been desulferising he must have been desulferising we must have been desulferising you must have been desulferising they must have been desulferising

Negation

Simple form	V-ing form
I must not desulferise you must not desulferise he must not desulferise we must not desulferise you must not desulferise they must not desulferise	I must not be desulferising you must not be desulferising he must not be desulferising we must not be desulferising you must not be desulferising they must not be desulferising
Perfect	V-ing perfect
I must not have desulferised you must not have desulferised he must not have desulferised we must not have desulferised you must not have desulferised they must not have desulferised	I must not have been desulferising you must not have been desulferising he must not have been desulferising we must not have been desulferising you must not have been desulferising they must not have been desulferising

Interrogative form

Simple form	V-ing form
must I desulferise? must you desulferise? must he desulferise? must we desulferise? must you desulferise? must they desulferise?	must I be desulferising? must you be desulferising? must he be desulferising? must we be desulferising? must you be desulferising? must they be desulferising?
Perfect	V-ing perfect
must I have desulferised? must you have desulferised? must he have desulferised? must we have desulferised? must you have desulferised? must they have desulferised?	must I have been desulferising? must you have been desulferising? must he have been desulferising? must we have been desulferising? must you have been desulferising? must they have been desulferising?

Interro-negative form

Simple form	V-ing form
must I not desulferise? must you not desulferise? must he not desulferise? must we not desulferise? must you not desulferise? must they not desulferise?	must I not be desulferising? must you not be desulferising? must he not be desulferising? must we not be desulferising? must you not be desulferising? must they not be desulferising?
Perfect	V-ing perfect
must I not have desulferised? must you not have desulferised? must he not have desulferised? must we not have desulferised? must you not have desulferised? must they not have desulferised?	must I not have been desulferising? must you not have been desulferising? must he not have been desulferising? must we not have been desulferising? must you not have been desulferising? must they not have been desulferising?