must fetter
Regular verb: fetter - fettered- fettered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must fetter
you must fetter
he must fetter
we must fetter
you must fetter
they must fetter 	I must be fettering
you must be fettering
he must be fettering
we must be fettering
you must be fettering
they must be fettering	I must have fettered
you must have fettered
he must have fettered
we must have fettered
you must have fettered
they must have fettered	I must have been fettering
you must have been fettering
he must have been fettering
we must have been fettering
you must have been fettering
they must have been fettering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't fetter
you mustn't fetter
he mustn't fetter
we mustn't fetter
you mustn't fetter
they mustn't fetter 	I mustn't be fettering
you mustn't be fettering
he mustn't be fettering
we mustn't be fettering
you mustn't be fettering
they mustn't be fettering	I mustn't have fettered
you mustn't have fettered
he mustn't have fettered
we mustn't have fettered
you mustn't have fettered
they mustn't have fettered	I mustn't have been fettering
you mustn't have been fettering
he mustn't have been fettering
we mustn't have been fettering
you mustn't have been fettering
they mustn't have been fettering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I fetter?
must you fetter?
must he fetter?
must we fetter?
must you fetter?
must they fetter? 	must I be fettering?
must you be fettering?
must he be fettering?
must we be fettering?
must you be fettering?
must they be fettering? 	must I have fettered?
must you have fettered?
must he have fettered?
must we have fettered?
must you have fettered?
must they have fettered? 	must I have been fettering?
must you have been fettering?
must he have been fettering?
must we have been fettering?
must you have been fettering?
must they have been fettering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I fetter?
mustn't you fetter?
mustn't he fetter?
mustn't we fetter?
mustn't you fetter?
mustn't they fetter? 	mustn't I be fettering?
mustn't you be fettering?
mustn't he be fettering?
mustn't we be fettering?
mustn't you be fettering?
mustn't they be fettering? 	mustn't I have fettered?
mustn't you have fettered?
mustn't he have fettered?
mustn't we have fettered?
mustn't you have fettered?
mustn't they have fettered? 	mustn't I have been fettering?
mustn't you have been fettering?
mustn't he have been fettering?
mustn't we have been fettering?
mustn't you have been fettering?
mustn't they have been fettering?