must fiddle
Regular verb: fiddle - fiddled- fiddled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must fiddle
you must fiddle
he must fiddle
we must fiddle
you must fiddle
they must fiddle 	I must be fiddling
you must be fiddling
he must be fiddling
we must be fiddling
you must be fiddling
they must be fiddling	I must have fiddled
you must have fiddled
he must have fiddled
we must have fiddled
you must have fiddled
they must have fiddled	I must have been fiddling
you must have been fiddling
he must have been fiddling
we must have been fiddling
you must have been fiddling
they must have been fiddling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't fiddle
you mustn't fiddle
he mustn't fiddle
we mustn't fiddle
you mustn't fiddle
they mustn't fiddle 	I mustn't be fiddling
you mustn't be fiddling
he mustn't be fiddling
we mustn't be fiddling
you mustn't be fiddling
they mustn't be fiddling	I mustn't have fiddled
you mustn't have fiddled
he mustn't have fiddled
we mustn't have fiddled
you mustn't have fiddled
they mustn't have fiddled	I mustn't have been fiddling
you mustn't have been fiddling
he mustn't have been fiddling
we mustn't have been fiddling
you mustn't have been fiddling
they mustn't have been fiddling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I fiddle?
must you fiddle?
must he fiddle?
must we fiddle?
must you fiddle?
must they fiddle? 	must I be fiddling?
must you be fiddling?
must he be fiddling?
must we be fiddling?
must you be fiddling?
must they be fiddling? 	must I have fiddled?
must you have fiddled?
must he have fiddled?
must we have fiddled?
must you have fiddled?
must they have fiddled? 	must I have been fiddling?
must you have been fiddling?
must he have been fiddling?
must we have been fiddling?
must you have been fiddling?
must they have been fiddling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I fiddle?
mustn't you fiddle?
mustn't he fiddle?
mustn't we fiddle?
mustn't you fiddle?
mustn't they fiddle? 	mustn't I be fiddling?
mustn't you be fiddling?
mustn't he be fiddling?
mustn't we be fiddling?
mustn't you be fiddling?
mustn't they be fiddling? 	mustn't I have fiddled?
mustn't you have fiddled?
mustn't he have fiddled?
mustn't we have fiddled?
mustn't you have fiddled?
mustn't they have fiddled? 	mustn't I have been fiddling?
mustn't you have been fiddling?
mustn't he have been fiddling?
mustn't we have been fiddling?
mustn't you have been fiddling?
mustn't they have been fiddling?