could sunbathe
Regular verb: sunbathe - sunbathed- sunbathed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could sunbathe
you could sunbathe
he could sunbathe
we could sunbathe
you could sunbathe
they could sunbathe 	I could be sunbathing
you could be sunbathing
he could be sunbathing
we could be sunbathing
you could be sunbathing
they could be sunbathing	I could have sunbathed
you could have sunbathed
he could have sunbathed
we could have sunbathed
you could have sunbathed
they could have sunbathed	I could have been sunbathing
you could have been sunbathing
he could have been sunbathing
we could have been sunbathing
you could have been sunbathing
they could have been sunbathing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't sunbathe
you couldn't sunbathe
he couldn't sunbathe
we couldn't sunbathe
you couldn't sunbathe
they couldn't sunbathe 	I couldn't be sunbathing
you couldn't be sunbathing
he couldn't be sunbathing
we couldn't be sunbathing
you couldn't be sunbathing
they couldn't be sunbathing	I couldn't have sunbathed
you couldn't have sunbathed
he couldn't have sunbathed
we couldn't have sunbathed
you couldn't have sunbathed
they couldn't have sunbathed	I couldn't have been sunbathing
you couldn't have been sunbathing
he couldn't have been sunbathing
we couldn't have been sunbathing
you couldn't have been sunbathing
they couldn't have been sunbathing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I sunbathe?
could you sunbathe?
could he sunbathe?
could we sunbathe?
could you sunbathe?
could they sunbathe? 	could I be sunbathing?
could you be sunbathing?
could he be sunbathing?
could we be sunbathing?
could you be sunbathing?
could they be sunbathing? 	could I have sunbathed?
could you have sunbathed?
could he have sunbathed?
could we have sunbathed?
could you have sunbathed?
could they have sunbathed? 	could I have been sunbathing?
could you have been sunbathing?
could he have been sunbathing?
could we have been sunbathing?
could you have been sunbathing?
could they have been sunbathing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I sunbathe?
couldn't you sunbathe?
couldn't he sunbathe?
couldn't we sunbathe?
couldn't you sunbathe?
couldn't they sunbathe? 	couldn't I be sunbathing?
couldn't you be sunbathing?
couldn't he be sunbathing?
couldn't we be sunbathing?
couldn't you be sunbathing?
couldn't they be sunbathing? 	couldn't I have sunbathed?
couldn't you have sunbathed?
couldn't he have sunbathed?
couldn't we have sunbathed?
couldn't you have sunbathed?
couldn't they have sunbathed? 	couldn't I have been sunbathing?
couldn't you have been sunbathing?
couldn't he have been sunbathing?
couldn't we have been sunbathing?
couldn't you have been sunbathing?
couldn't they have been sunbathing?