could average
Regular verb: average - averaged- averaged

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could average
you could average
she could average
we could average
you could average
they could average 	I could be averaging
you could be averaging
she could be averaging
we could be averaging
you could be averaging
they could be averaging	I could have averaged
you could have averaged
she could have averaged
we could have averaged
you could have averaged
they could have averaged	I could have been averaging
you could have been averaging
she could have been averaging
we could have been averaging
you could have been averaging
they could have been averaging	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't average
you couldn't average
she couldn't average
we couldn't average
you couldn't average
they couldn't average 	I couldn't be averaging
you couldn't be averaging
she couldn't be averaging
we couldn't be averaging
you couldn't be averaging
they couldn't be averaging	I couldn't have averaged
you couldn't have averaged
she couldn't have averaged
we couldn't have averaged
you couldn't have averaged
they couldn't have averaged	I couldn't have been averaging
you couldn't have been averaging
she couldn't have been averaging
we couldn't have been averaging
you couldn't have been averaging
they couldn't have been averaging	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I average?
could you average?
could she average?
could we average?
could you average?
could they average? 	could I be averaging?
could you be averaging?
could she be averaging?
could we be averaging?
could you be averaging?
could they be averaging? 	could I have averaged?
could you have averaged?
could she have averaged?
could we have averaged?
could you have averaged?
could they have averaged? 	could I have been averaging?
could you have been averaging?
could she have been averaging?
could we have been averaging?
could you have been averaging?
could they have been averaging? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I average?
couldn't you average?
couldn't she average?
couldn't we average?
couldn't you average?
couldn't they average? 	couldn't I be averaging?
couldn't you be averaging?
couldn't she be averaging?
couldn't we be averaging?
couldn't you be averaging?
couldn't they be averaging? 	couldn't I have averaged?
couldn't you have averaged?
couldn't she have averaged?
couldn't we have averaged?
couldn't you have averaged?
couldn't they have averaged? 	couldn't I have been averaging?
couldn't you have been averaging?
couldn't she have been averaging?
couldn't we have been averaging?
couldn't you have been averaging?
couldn't they have been averaging?