must fettle
Regular verb: fettle - fettled- fettled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must fettle
you must fettle
she must fettle
we must fettle
you must fettle
they must fettle 	I must be fettling
you must be fettling
she must be fettling
we must be fettling
you must be fettling
they must be fettling	I must have fettled
you must have fettled
she must have fettled
we must have fettled
you must have fettled
they must have fettled	I must have been fettling
you must have been fettling
she must have been fettling
we must have been fettling
you must have been fettling
they must have been fettling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't fettle
you mustn't fettle
she mustn't fettle
we mustn't fettle
you mustn't fettle
they mustn't fettle 	I mustn't be fettling
you mustn't be fettling
she mustn't be fettling
we mustn't be fettling
you mustn't be fettling
they mustn't be fettling	I mustn't have fettled
you mustn't have fettled
she mustn't have fettled
we mustn't have fettled
you mustn't have fettled
they mustn't have fettled	I mustn't have been fettling
you mustn't have been fettling
she mustn't have been fettling
we mustn't have been fettling
you mustn't have been fettling
they mustn't have been fettling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I fettle?
must you fettle?
must she fettle?
must we fettle?
must you fettle?
must they fettle? 	must I be fettling?
must you be fettling?
must she be fettling?
must we be fettling?
must you be fettling?
must they be fettling? 	must I have fettled?
must you have fettled?
must she have fettled?
must we have fettled?
must you have fettled?
must they have fettled? 	must I have been fettling?
must you have been fettling?
must she have been fettling?
must we have been fettling?
must you have been fettling?
must they have been fettling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I fettle?
mustn't you fettle?
mustn't she fettle?
mustn't we fettle?
mustn't you fettle?
mustn't they fettle? 	mustn't I be fettling?
mustn't you be fettling?
mustn't she be fettling?
mustn't we be fettling?
mustn't you be fettling?
mustn't they be fettling? 	mustn't I have fettled?
mustn't you have fettled?
mustn't she have fettled?
mustn't we have fettled?
mustn't you have fettled?
mustn't they have fettled? 	mustn't I have been fettling?
mustn't you have been fettling?
mustn't she have been fettling?
mustn't we have been fettling?
mustn't you have been fettling?
mustn't they have been fettling?