could confer
Regular verb: confer - conferred- conferred

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could confer
you could confer
he could confer
we could confer
you could confer
they could confer 	I could be conferring
you could be conferring
he could be conferring
we could be conferring
you could be conferring
they could be conferring	I could have conferred
you could have conferred
he could have conferred
we could have conferred
you could have conferred
they could have conferred	I could have been conferring
you could have been conferring
he could have been conferring
we could have been conferring
you could have been conferring
they could have been conferring	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't confer
you couldn't confer
he couldn't confer
we couldn't confer
you couldn't confer
they couldn't confer 	I couldn't be conferring
you couldn't be conferring
he couldn't be conferring
we couldn't be conferring
you couldn't be conferring
they couldn't be conferring	I couldn't have conferred
you couldn't have conferred
he couldn't have conferred
we couldn't have conferred
you couldn't have conferred
they couldn't have conferred	I couldn't have been conferring
you couldn't have been conferring
he couldn't have been conferring
we couldn't have been conferring
you couldn't have been conferring
they couldn't have been conferring	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I confer?
could you confer?
could he confer?
could we confer?
could you confer?
could they confer? 	could I be conferring?
could you be conferring?
could he be conferring?
could we be conferring?
could you be conferring?
could they be conferring? 	could I have conferred?
could you have conferred?
could he have conferred?
could we have conferred?
could you have conferred?
could they have conferred? 	could I have been conferring?
could you have been conferring?
could he have been conferring?
could we have been conferring?
could you have been conferring?
could they have been conferring? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I confer?
couldn't you confer?
couldn't he confer?
couldn't we confer?
couldn't you confer?
couldn't they confer? 	couldn't I be conferring?
couldn't you be conferring?
couldn't he be conferring?
couldn't we be conferring?
couldn't you be conferring?
couldn't they be conferring? 	couldn't I have conferred?
couldn't you have conferred?
couldn't he have conferred?
couldn't we have conferred?
couldn't you have conferred?
couldn't they have conferred? 	couldn't I have been conferring?
couldn't you have been conferring?
couldn't he have been conferring?
couldn't we have been conferring?
couldn't you have been conferring?
couldn't they have been conferring?