could decoke
Regular verb: decoke - decoked- decoked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could decoke
you could decoke
she could decoke
we could decoke
you could decoke
they could decoke 	I could be decoking
you could be decoking
she could be decoking
we could be decoking
you could be decoking
they could be decoking	I could have decoked
you could have decoked
she could have decoked
we could have decoked
you could have decoked
they could have decoked	I could have been decoking
you could have been decoking
she could have been decoking
we could have been decoking
you could have been decoking
they could have been decoking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't decoke
you couldn't decoke
she couldn't decoke
we couldn't decoke
you couldn't decoke
they couldn't decoke 	I couldn't be decoking
you couldn't be decoking
she couldn't be decoking
we couldn't be decoking
you couldn't be decoking
they couldn't be decoking	I couldn't have decoked
you couldn't have decoked
she couldn't have decoked
we couldn't have decoked
you couldn't have decoked
they couldn't have decoked	I couldn't have been decoking
you couldn't have been decoking
she couldn't have been decoking
we couldn't have been decoking
you couldn't have been decoking
they couldn't have been decoking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I decoke?
could you decoke?
could she decoke?
could we decoke?
could you decoke?
could they decoke? 	could I be decoking?
could you be decoking?
could she be decoking?
could we be decoking?
could you be decoking?
could they be decoking? 	could I have decoked?
could you have decoked?
could she have decoked?
could we have decoked?
could you have decoked?
could they have decoked? 	could I have been decoking?
could you have been decoking?
could she have been decoking?
could we have been decoking?
could you have been decoking?
could they have been decoking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I decoke?
couldn't you decoke?
couldn't she decoke?
couldn't we decoke?
couldn't you decoke?
couldn't they decoke? 	couldn't I be decoking?
couldn't you be decoking?
couldn't she be decoking?
couldn't we be decoking?
couldn't you be decoking?
couldn't they be decoking? 	couldn't I have decoked?
couldn't you have decoked?
couldn't she have decoked?
couldn't we have decoked?
couldn't you have decoked?
couldn't they have decoked? 	couldn't I have been decoking?
couldn't you have been decoking?
couldn't she have been decoking?
couldn't we have been decoking?
couldn't you have been decoking?
couldn't they have been decoking?