must chapter
Regular verb: chapter - chaptered- chaptered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must chapter
you must chapter
he must chapter
we must chapter
you must chapter
they must chapter 	I must be chaptering
you must be chaptering
he must be chaptering
we must be chaptering
you must be chaptering
they must be chaptering	I must have chaptered
you must have chaptered
he must have chaptered
we must have chaptered
you must have chaptered
they must have chaptered	I must have been chaptering
you must have been chaptering
he must have been chaptering
we must have been chaptering
you must have been chaptering
they must have been chaptering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not chapter
you must not chapter
he must not chapter
we must not chapter
you must not chapter
they must not chapter 	I must not be chaptering
you must not be chaptering
he must not be chaptering
we must not be chaptering
you must not be chaptering
they must not be chaptering	I must not have chaptered
you must not have chaptered
he must not have chaptered
we must not have chaptered
you must not have chaptered
they must not have chaptered	I must not have been chaptering
you must not have been chaptering
he must not have been chaptering
we must not have been chaptering
you must not have been chaptering
they must not have been chaptering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I chapter?
must you chapter?
must he chapter?
must we chapter?
must you chapter?
must they chapter? 	must I be chaptering?
must you be chaptering?
must he be chaptering?
must we be chaptering?
must you be chaptering?
must they be chaptering? 	must I have chaptered?
must you have chaptered?
must he have chaptered?
must we have chaptered?
must you have chaptered?
must they have chaptered? 	must I have been chaptering?
must you have been chaptering?
must he have been chaptering?
must we have been chaptering?
must you have been chaptering?
must they have been chaptering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not chapter?
must you not chapter?
must he not chapter?
must we not chapter?
must you not chapter?
must they not chapter? 	must I not be chaptering?
must you not be chaptering?
must he not be chaptering?
must we not be chaptering?
must you not be chaptering?
must they not be chaptering? 	must I not have chaptered?
must you not have chaptered?
must he not have chaptered?
must we not have chaptered?
must you not have chaptered?
must they not have chaptered? 	must I not have been chaptering?
must you not have been chaptering?
must he not have been chaptering?
must we not have been chaptering?
must you not have been chaptering?
must they not have been chaptering?