must dredge
Regular verb: dredge - dredged- dredged

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must dredge
you must dredge
she must dredge
we must dredge
you must dredge
they must dredge 	I must be dredging
you must be dredging
she must be dredging
we must be dredging
you must be dredging
they must be dredging	I must have dredged
you must have dredged
she must have dredged
we must have dredged
you must have dredged
they must have dredged	I must have been dredging
you must have been dredging
she must have been dredging
we must have been dredging
you must have been dredging
they must have been dredging	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't dredge
you mustn't dredge
she mustn't dredge
we mustn't dredge
you mustn't dredge
they mustn't dredge 	I mustn't be dredging
you mustn't be dredging
she mustn't be dredging
we mustn't be dredging
you mustn't be dredging
they mustn't be dredging	I mustn't have dredged
you mustn't have dredged
she mustn't have dredged
we mustn't have dredged
you mustn't have dredged
they mustn't have dredged	I mustn't have been dredging
you mustn't have been dredging
she mustn't have been dredging
we mustn't have been dredging
you mustn't have been dredging
they mustn't have been dredging	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I dredge?
must you dredge?
must she dredge?
must we dredge?
must you dredge?
must they dredge? 	must I be dredging?
must you be dredging?
must she be dredging?
must we be dredging?
must you be dredging?
must they be dredging? 	must I have dredged?
must you have dredged?
must she have dredged?
must we have dredged?
must you have dredged?
must they have dredged? 	must I have been dredging?
must you have been dredging?
must she have been dredging?
must we have been dredging?
must you have been dredging?
must they have been dredging? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I dredge?
mustn't you dredge?
mustn't she dredge?
mustn't we dredge?
mustn't you dredge?
mustn't they dredge? 	mustn't I be dredging?
mustn't you be dredging?
mustn't she be dredging?
mustn't we be dredging?
mustn't you be dredging?
mustn't they be dredging? 	mustn't I have dredged?
mustn't you have dredged?
mustn't she have dredged?
mustn't we have dredged?
mustn't you have dredged?
mustn't they have dredged? 	mustn't I have been dredging?
mustn't you have been dredging?
mustn't she have been dredging?
mustn't we have been dredging?
mustn't you have been dredging?
mustn't they have been dredging?