must usurp
Regular verb: usurp - usurped- usurped

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must usurp
you must usurp
he must usurp
we must usurp
you must usurp
they must usurp 	I must be usurping
you must be usurping
he must be usurping
we must be usurping
you must be usurping
they must be usurping	I must have usurped
you must have usurped
he must have usurped
we must have usurped
you must have usurped
they must have usurped	I must have been usurping
you must have been usurping
he must have been usurping
we must have been usurping
you must have been usurping
they must have been usurping	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not usurp
you must not usurp
he must not usurp
we must not usurp
you must not usurp
they must not usurp 	I must not be usurping
you must not be usurping
he must not be usurping
we must not be usurping
you must not be usurping
they must not be usurping	I must not have usurped
you must not have usurped
he must not have usurped
we must not have usurped
you must not have usurped
they must not have usurped	I must not have been usurping
you must not have been usurping
he must not have been usurping
we must not have been usurping
you must not have been usurping
they must not have been usurping	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I usurp?
must you usurp?
must he usurp?
must we usurp?
must you usurp?
must they usurp? 	must I be usurping?
must you be usurping?
must he be usurping?
must we be usurping?
must you be usurping?
must they be usurping? 	must I have usurped?
must you have usurped?
must he have usurped?
must we have usurped?
must you have usurped?
must they have usurped? 	must I have been usurping?
must you have been usurping?
must he have been usurping?
must we have been usurping?
must you have been usurping?
must they have been usurping? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not usurp?
must you not usurp?
must he not usurp?
must we not usurp?
must you not usurp?
must they not usurp? 	must I not be usurping?
must you not be usurping?
must he not be usurping?
must we not be usurping?
must you not be usurping?
must they not be usurping? 	must I not have usurped?
must you not have usurped?
must he not have usurped?
must we not have usurped?
must you not have usurped?
must they not have usurped? 	must I not have been usurping?
must you not have been usurping?
must he not have been usurping?
must we not have been usurping?
must you not have been usurping?
must they not have been usurping?