must disagree
Regular verb: disagree - disagreed- disagreed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must disagree
you must disagree
he must disagree
we must disagree
you must disagree
they must disagree 	I must be disagreeing
you must be disagreeing
he must be disagreeing
we must be disagreeing
you must be disagreeing
they must be disagreeing	I must have disagreed
you must have disagreed
he must have disagreed
we must have disagreed
you must have disagreed
they must have disagreed	I must have been disagreeing
you must have been disagreeing
he must have been disagreeing
we must have been disagreeing
you must have been disagreeing
they must have been disagreeing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not disagree
you must not disagree
he must not disagree
we must not disagree
you must not disagree
they must not disagree 	I must not be disagreeing
you must not be disagreeing
he must not be disagreeing
we must not be disagreeing
you must not be disagreeing
they must not be disagreeing	I must not have disagreed
you must not have disagreed
he must not have disagreed
we must not have disagreed
you must not have disagreed
they must not have disagreed	I must not have been disagreeing
you must not have been disagreeing
he must not have been disagreeing
we must not have been disagreeing
you must not have been disagreeing
they must not have been disagreeing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I disagree?
must you disagree?
must he disagree?
must we disagree?
must you disagree?
must they disagree? 	must I be disagreeing?
must you be disagreeing?
must he be disagreeing?
must we be disagreeing?
must you be disagreeing?
must they be disagreeing? 	must I have disagreed?
must you have disagreed?
must he have disagreed?
must we have disagreed?
must you have disagreed?
must they have disagreed? 	must I have been disagreeing?
must you have been disagreeing?
must he have been disagreeing?
must we have been disagreeing?
must you have been disagreeing?
must they have been disagreeing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not disagree?
must you not disagree?
must he not disagree?
must we not disagree?
must you not disagree?
must they not disagree? 	must I not be disagreeing?
must you not be disagreeing?
must he not be disagreeing?
must we not be disagreeing?
must you not be disagreeing?
must they not be disagreeing? 	must I not have disagreed?
must you not have disagreed?
must he not have disagreed?
must we not have disagreed?
must you not have disagreed?
must they not have disagreed? 	must I not have been disagreeing?
must you not have been disagreeing?
must he not have been disagreeing?
must we not have been disagreeing?
must you not have been disagreeing?
must they not have been disagreeing?