could dredge
Regular verb: dredge - dredged- dredged

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

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

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

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