could somersault
Regular verb: somersault - somersaulted- somersaulted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could somersault
you could somersault
he could somersault
we could somersault
you could somersault
they could somersault 	I could be somersaulting
you could be somersaulting
he could be somersaulting
we could be somersaulting
you could be somersaulting
they could be somersaulting	I could have somersaulted
you could have somersaulted
he could have somersaulted
we could have somersaulted
you could have somersaulted
they could have somersaulted	I could have been somersaulting
you could have been somersaulting
he could have been somersaulting
we could have been somersaulting
you could have been somersaulting
they could have been somersaulting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't somersault
you couldn't somersault
he couldn't somersault
we couldn't somersault
you couldn't somersault
they couldn't somersault 	I couldn't be somersaulting
you couldn't be somersaulting
he couldn't be somersaulting
we couldn't be somersaulting
you couldn't be somersaulting
they couldn't be somersaulting	I couldn't have somersaulted
you couldn't have somersaulted
he couldn't have somersaulted
we couldn't have somersaulted
you couldn't have somersaulted
they couldn't have somersaulted	I couldn't have been somersaulting
you couldn't have been somersaulting
he couldn't have been somersaulting
we couldn't have been somersaulting
you couldn't have been somersaulting
they couldn't have been somersaulting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I somersault?
could you somersault?
could he somersault?
could we somersault?
could you somersault?
could they somersault? 	could I be somersaulting?
could you be somersaulting?
could he be somersaulting?
could we be somersaulting?
could you be somersaulting?
could they be somersaulting? 	could I have somersaulted?
could you have somersaulted?
could he have somersaulted?
could we have somersaulted?
could you have somersaulted?
could they have somersaulted? 	could I have been somersaulting?
could you have been somersaulting?
could he have been somersaulting?
could we have been somersaulting?
could you have been somersaulting?
could they have been somersaulting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I somersault?
couldn't you somersault?
couldn't he somersault?
couldn't we somersault?
couldn't you somersault?
couldn't they somersault? 	couldn't I be somersaulting?
couldn't you be somersaulting?
couldn't he be somersaulting?
couldn't we be somersaulting?
couldn't you be somersaulting?
couldn't they be somersaulting? 	couldn't I have somersaulted?
couldn't you have somersaulted?
couldn't he have somersaulted?
couldn't we have somersaulted?
couldn't you have somersaulted?
couldn't they have somersaulted? 	couldn't I have been somersaulting?
couldn't you have been somersaulting?
couldn't he have been somersaulting?
couldn't we have been somersaulting?
couldn't you have been somersaulting?
couldn't they have been somersaulting?