must girth
Regular verb: girth - girthed- girthed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must girth
you must girth
he must girth
we must girth
you must girth
they must girth 	I must be girthing
you must be girthing
he must be girthing
we must be girthing
you must be girthing
they must be girthing	I must have girthed
you must have girthed
he must have girthed
we must have girthed
you must have girthed
they must have girthed	I must have been girthing
you must have been girthing
he must have been girthing
we must have been girthing
you must have been girthing
they must have been girthing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not girth
you must not girth
he must not girth
we must not girth
you must not girth
they must not girth 	I must not be girthing
you must not be girthing
he must not be girthing
we must not be girthing
you must not be girthing
they must not be girthing	I must not have girthed
you must not have girthed
he must not have girthed
we must not have girthed
you must not have girthed
they must not have girthed	I must not have been girthing
you must not have been girthing
he must not have been girthing
we must not have been girthing
you must not have been girthing
they must not have been girthing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I girth?
must you girth?
must he girth?
must we girth?
must you girth?
must they girth? 	must I be girthing?
must you be girthing?
must he be girthing?
must we be girthing?
must you be girthing?
must they be girthing? 	must I have girthed?
must you have girthed?
must he have girthed?
must we have girthed?
must you have girthed?
must they have girthed? 	must I have been girthing?
must you have been girthing?
must he have been girthing?
must we have been girthing?
must you have been girthing?
must they have been girthing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not girth?
must you not girth?
must he not girth?
must we not girth?
must you not girth?
must they not girth? 	must I not be girthing?
must you not be girthing?
must he not be girthing?
must we not be girthing?
must you not be girthing?
must they not be girthing? 	must I not have girthed?
must you not have girthed?
must he not have girthed?
must we not have girthed?
must you not have girthed?
must they not have girthed? 	must I not have been girthing?
must you not have been girthing?
must he not have been girthing?
must we not have been girthing?
must you not have been girthing?
must they not have been girthing?