could dope
Regular verb: dope - doped- doped

Affirmation 	
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I could dope
you could dope
he could dope
we could dope
you could dope
they could dope 	I could be doping
you could be doping
he could be doping
we could be doping
you could be doping
they could be doping	I could have doped
you could have doped
he could have doped
we could have doped
you could have doped
they could have doped	I could have been doping
you could have been doping
he could have been doping
we could have been doping
you could have been doping
they could have been doping	

Negation 	
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I couldn't dope
you couldn't dope
he couldn't dope
we couldn't dope
you couldn't dope
they couldn't dope 	I couldn't be doping
you couldn't be doping
he couldn't be doping
we couldn't be doping
you couldn't be doping
they couldn't be doping	I couldn't have doped
you couldn't have doped
he couldn't have doped
we couldn't have doped
you couldn't have doped
they couldn't have doped	I couldn't have been doping
you couldn't have been doping
he couldn't have been doping
we couldn't have been doping
you couldn't have been doping
they couldn't have been doping	

Interrogative form 	
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could I dope?
could you dope?
could he dope?
could we dope?
could you dope?
could they dope? 	could I be doping?
could you be doping?
could he be doping?
could we be doping?
could you be doping?
could they be doping? 	could I have doped?
could you have doped?
could he have doped?
could we have doped?
could you have doped?
could they have doped? 	could I have been doping?
could you have been doping?
could he have been doping?
could we have been doping?
could you have been doping?
could they have been doping? 	

Interro-negative form 	
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couldn't I dope?
couldn't you dope?
couldn't he dope?
couldn't we dope?
couldn't you dope?
couldn't they dope? 	couldn't I be doping?
couldn't you be doping?
couldn't he be doping?
couldn't we be doping?
couldn't you be doping?
couldn't they be doping? 	couldn't I have doped?
couldn't you have doped?
couldn't he have doped?
couldn't we have doped?
couldn't you have doped?
couldn't they have doped? 	couldn't I have been doping?
couldn't you have been doping?
couldn't he have been doping?
couldn't we have been doping?
couldn't you have been doping?
couldn't they have been doping?