could number
Regular verb: number - numbered- numbered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could number
you could number
he could number
we could number
you could number
they could number 	I could be numbering
you could be numbering
he could be numbering
we could be numbering
you could be numbering
they could be numbering	I could have numbered
you could have numbered
he could have numbered
we could have numbered
you could have numbered
they could have numbered	I could have been numbering
you could have been numbering
he could have been numbering
we could have been numbering
you could have been numbering
they could have been numbering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not number
you could not number
he could not number
we could not number
you could not number
they could not number 	I could not be numbering
you could not be numbering
he could not be numbering
we could not be numbering
you could not be numbering
they could not be numbering	I could not have numbered
you could not have numbered
he could not have numbered
we could not have numbered
you could not have numbered
they could not have numbered	I could not have been numbering
you could not have been numbering
he could not have been numbering
we could not have been numbering
you could not have been numbering
they could not have been numbering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I number?
could you number?
could he number?
could we number?
could you number?
could they number? 	could I be numbering?
could you be numbering?
could he be numbering?
could we be numbering?
could you be numbering?
could they be numbering? 	could I have numbered?
could you have numbered?
could he have numbered?
could we have numbered?
could you have numbered?
could they have numbered? 	could I have been numbering?
could you have been numbering?
could he have been numbering?
could we have been numbering?
could you have been numbering?
could they have been numbering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not number?
could you not number?
could he not number?
could we not number?
could you not number?
could they not number? 	could I not be numbering?
could you not be numbering?
could he not be numbering?
could we not be numbering?
could you not be numbering?
could they not be numbering? 	could I not have numbered?
could you not have numbered?
could he not have numbered?
could we not have numbered?
could you not have numbered?
could they not have numbered? 	could I not have been numbering?
could you not have been numbering?
could he not have been numbering?
could we not have been numbering?
could you not have been numbering?
could they not have been numbering?