must stable
Regular verb: stable - stabled- stabled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must stable
you must stable
she must stable
we must stable
you must stable
they must stable 	I must be stabling
you must be stabling
she must be stabling
we must be stabling
you must be stabling
they must be stabling	I must have stabled
you must have stabled
she must have stabled
we must have stabled
you must have stabled
they must have stabled	I must have been stabling
you must have been stabling
she must have been stabling
we must have been stabling
you must have been stabling
they must have been stabling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not stable
you must not stable
she must not stable
we must not stable
you must not stable
they must not stable 	I must not be stabling
you must not be stabling
she must not be stabling
we must not be stabling
you must not be stabling
they must not be stabling	I must not have stabled
you must not have stabled
she must not have stabled
we must not have stabled
you must not have stabled
they must not have stabled	I must not have been stabling
you must not have been stabling
she must not have been stabling
we must not have been stabling
you must not have been stabling
they must not have been stabling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I stable?
must you stable?
must she stable?
must we stable?
must you stable?
must they stable? 	must I be stabling?
must you be stabling?
must she be stabling?
must we be stabling?
must you be stabling?
must they be stabling? 	must I have stabled?
must you have stabled?
must she have stabled?
must we have stabled?
must you have stabled?
must they have stabled? 	must I have been stabling?
must you have been stabling?
must she have been stabling?
must we have been stabling?
must you have been stabling?
must they have been stabling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not stable?
must you not stable?
must she not stable?
must we not stable?
must you not stable?
must they not stable? 	must I not be stabling?
must you not be stabling?
must she not be stabling?
must we not be stabling?
must you not be stabling?
must they not be stabling? 	must I not have stabled?
must you not have stabled?
must she not have stabled?
must we not have stabled?
must you not have stabled?
must they not have stabled? 	must I not have been stabling?
must you not have been stabling?
must she not have been stabling?
must we not have been stabling?
must you not have been stabling?
must they not have been stabling?