could cosh
Regular verb: cosh - coshed- coshed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could cosh
you could cosh
he could cosh
we could cosh
you could cosh
they could cosh 	I could be coshing
you could be coshing
he could be coshing
we could be coshing
you could be coshing
they could be coshing	I could have coshed
you could have coshed
he could have coshed
we could have coshed
you could have coshed
they could have coshed	I could have been coshing
you could have been coshing
he could have been coshing
we could have been coshing
you could have been coshing
they could have been coshing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't cosh
you couldn't cosh
he couldn't cosh
we couldn't cosh
you couldn't cosh
they couldn't cosh 	I couldn't be coshing
you couldn't be coshing
he couldn't be coshing
we couldn't be coshing
you couldn't be coshing
they couldn't be coshing	I couldn't have coshed
you couldn't have coshed
he couldn't have coshed
we couldn't have coshed
you couldn't have coshed
they couldn't have coshed	I couldn't have been coshing
you couldn't have been coshing
he couldn't have been coshing
we couldn't have been coshing
you couldn't have been coshing
they couldn't have been coshing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I cosh?
could you cosh?
could he cosh?
could we cosh?
could you cosh?
could they cosh? 	could I be coshing?
could you be coshing?
could he be coshing?
could we be coshing?
could you be coshing?
could they be coshing? 	could I have coshed?
could you have coshed?
could he have coshed?
could we have coshed?
could you have coshed?
could they have coshed? 	could I have been coshing?
could you have been coshing?
could he have been coshing?
could we have been coshing?
could you have been coshing?
could they have been coshing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I cosh?
couldn't you cosh?
couldn't he cosh?
couldn't we cosh?
couldn't you cosh?
couldn't they cosh? 	couldn't I be coshing?
couldn't you be coshing?
couldn't he be coshing?
couldn't we be coshing?
couldn't you be coshing?
couldn't they be coshing? 	couldn't I have coshed?
couldn't you have coshed?
couldn't he have coshed?
couldn't we have coshed?
couldn't you have coshed?
couldn't they have coshed? 	couldn't I have been coshing?
couldn't you have been coshing?
couldn't he have been coshing?
couldn't we have been coshing?
couldn't you have been coshing?
couldn't they have been coshing?