must chapter
Regular verb: chapter - chaptered- chaptered

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