could overdose
Regular verb: overdose - overdosed- overdosed

Affirmation 	
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I could overdose
you could overdose
she could overdose
we could overdose
you could overdose
they could overdose 	I could be overdosing
you could be overdosing
she could be overdosing
we could be overdosing
you could be overdosing
they could be overdosing	I could have overdosed
you could have overdosed
she could have overdosed
we could have overdosed
you could have overdosed
they could have overdosed	I could have been overdosing
you could have been overdosing
she could have been overdosing
we could have been overdosing
you could have been overdosing
they could have been overdosing	

Negation 	
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I couldn't overdose
you couldn't overdose
she couldn't overdose
we couldn't overdose
you couldn't overdose
they couldn't overdose 	I couldn't be overdosing
you couldn't be overdosing
she couldn't be overdosing
we couldn't be overdosing
you couldn't be overdosing
they couldn't be overdosing	I couldn't have overdosed
you couldn't have overdosed
she couldn't have overdosed
we couldn't have overdosed
you couldn't have overdosed
they couldn't have overdosed	I couldn't have been overdosing
you couldn't have been overdosing
she couldn't have been overdosing
we couldn't have been overdosing
you couldn't have been overdosing
they couldn't have been overdosing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I overdose?
could you overdose?
could she overdose?
could we overdose?
could you overdose?
could they overdose? 	could I be overdosing?
could you be overdosing?
could she be overdosing?
could we be overdosing?
could you be overdosing?
could they be overdosing? 	could I have overdosed?
could you have overdosed?
could she have overdosed?
could we have overdosed?
could you have overdosed?
could they have overdosed? 	could I have been overdosing?
could you have been overdosing?
could she have been overdosing?
could we have been overdosing?
could you have been overdosing?
could they have been overdosing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I overdose?
couldn't you overdose?
couldn't she overdose?
couldn't we overdose?
couldn't you overdose?
couldn't they overdose? 	couldn't I be overdosing?
couldn't you be overdosing?
couldn't she be overdosing?
couldn't we be overdosing?
couldn't you be overdosing?
couldn't they be overdosing? 	couldn't I have overdosed?
couldn't you have overdosed?
couldn't she have overdosed?
couldn't we have overdosed?
couldn't you have overdosed?
couldn't they have overdosed? 	couldn't I have been overdosing?
couldn't you have been overdosing?
couldn't she have been overdosing?
couldn't we have been overdosing?
couldn't you have been overdosing?
couldn't they have been overdosing?