must fuddle
Regular verb: fuddle - fuddled- fuddled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must fuddle
you must fuddle
she must fuddle
we must fuddle
you must fuddle
they must fuddle 	I must be fuddling
you must be fuddling
she must be fuddling
we must be fuddling
you must be fuddling
they must be fuddling	I must have fuddled
you must have fuddled
she must have fuddled
we must have fuddled
you must have fuddled
they must have fuddled	I must have been fuddling
you must have been fuddling
she must have been fuddling
we must have been fuddling
you must have been fuddling
they must have been fuddling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't fuddle
you mustn't fuddle
she mustn't fuddle
we mustn't fuddle
you mustn't fuddle
they mustn't fuddle 	I mustn't be fuddling
you mustn't be fuddling
she mustn't be fuddling
we mustn't be fuddling
you mustn't be fuddling
they mustn't be fuddling	I mustn't have fuddled
you mustn't have fuddled
she mustn't have fuddled
we mustn't have fuddled
you mustn't have fuddled
they mustn't have fuddled	I mustn't have been fuddling
you mustn't have been fuddling
she mustn't have been fuddling
we mustn't have been fuddling
you mustn't have been fuddling
they mustn't have been fuddling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I fuddle?
must you fuddle?
must she fuddle?
must we fuddle?
must you fuddle?
must they fuddle? 	must I be fuddling?
must you be fuddling?
must she be fuddling?
must we be fuddling?
must you be fuddling?
must they be fuddling? 	must I have fuddled?
must you have fuddled?
must she have fuddled?
must we have fuddled?
must you have fuddled?
must they have fuddled? 	must I have been fuddling?
must you have been fuddling?
must she have been fuddling?
must we have been fuddling?
must you have been fuddling?
must they have been fuddling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I fuddle?
mustn't you fuddle?
mustn't she fuddle?
mustn't we fuddle?
mustn't you fuddle?
mustn't they fuddle? 	mustn't I be fuddling?
mustn't you be fuddling?
mustn't she be fuddling?
mustn't we be fuddling?
mustn't you be fuddling?
mustn't they be fuddling? 	mustn't I have fuddled?
mustn't you have fuddled?
mustn't she have fuddled?
mustn't we have fuddled?
mustn't you have fuddled?
mustn't they have fuddled? 	mustn't I have been fuddling?
mustn't you have been fuddling?
mustn't she have been fuddling?
mustn't we have been fuddling?
mustn't you have been fuddling?
mustn't they have been fuddling?