could round
Regular verb: round - rounded- rounded

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could round
you could round
he could round
we could round
you could round
they could round 	I could be rounding
you could be rounding
he could be rounding
we could be rounding
you could be rounding
they could be rounding	I could have rounded
you could have rounded
he could have rounded
we could have rounded
you could have rounded
they could have rounded	I could have been rounding
you could have been rounding
he could have been rounding
we could have been rounding
you could have been rounding
they could have been rounding	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't round
you couldn't round
he couldn't round
we couldn't round
you couldn't round
they couldn't round 	I couldn't be rounding
you couldn't be rounding
he couldn't be rounding
we couldn't be rounding
you couldn't be rounding
they couldn't be rounding	I couldn't have rounded
you couldn't have rounded
he couldn't have rounded
we couldn't have rounded
you couldn't have rounded
they couldn't have rounded	I couldn't have been rounding
you couldn't have been rounding
he couldn't have been rounding
we couldn't have been rounding
you couldn't have been rounding
they couldn't have been rounding	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I round?
could you round?
could he round?
could we round?
could you round?
could they round? 	could I be rounding?
could you be rounding?
could he be rounding?
could we be rounding?
could you be rounding?
could they be rounding? 	could I have rounded?
could you have rounded?
could he have rounded?
could we have rounded?
could you have rounded?
could they have rounded? 	could I have been rounding?
could you have been rounding?
could he have been rounding?
could we have been rounding?
could you have been rounding?
could they have been rounding? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I round?
couldn't you round?
couldn't he round?
couldn't we round?
couldn't you round?
couldn't they round? 	couldn't I be rounding?
couldn't you be rounding?
couldn't he be rounding?
couldn't we be rounding?
couldn't you be rounding?
couldn't they be rounding? 	couldn't I have rounded?
couldn't you have rounded?
couldn't he have rounded?
couldn't we have rounded?
couldn't you have rounded?
couldn't they have rounded? 	couldn't I have been rounding?
couldn't you have been rounding?
couldn't he have been rounding?
couldn't we have been rounding?
couldn't you have been rounding?
couldn't they have been rounding?