could radiograph
Regular verb: radiograph - radiographed- radiographed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could radiograph
you could radiograph
she could radiograph
we could radiograph
you could radiograph
they could radiograph 	I could be radiographing
you could be radiographing
she could be radiographing
we could be radiographing
you could be radiographing
they could be radiographing	I could have radiographed
you could have radiographed
she could have radiographed
we could have radiographed
you could have radiographed
they could have radiographed	I could have been radiographing
you could have been radiographing
she could have been radiographing
we could have been radiographing
you could have been radiographing
they could have been radiographing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not radiograph
you could not radiograph
she could not radiograph
we could not radiograph
you could not radiograph
they could not radiograph 	I could not be radiographing
you could not be radiographing
she could not be radiographing
we could not be radiographing
you could not be radiographing
they could not be radiographing	I could not have radiographed
you could not have radiographed
she could not have radiographed
we could not have radiographed
you could not have radiographed
they could not have radiographed	I could not have been radiographing
you could not have been radiographing
she could not have been radiographing
we could not have been radiographing
you could not have been radiographing
they could not have been radiographing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I radiograph?
could you radiograph?
could she radiograph?
could we radiograph?
could you radiograph?
could they radiograph? 	could I be radiographing?
could you be radiographing?
could she be radiographing?
could we be radiographing?
could you be radiographing?
could they be radiographing? 	could I have radiographed?
could you have radiographed?
could she have radiographed?
could we have radiographed?
could you have radiographed?
could they have radiographed? 	could I have been radiographing?
could you have been radiographing?
could she have been radiographing?
could we have been radiographing?
could you have been radiographing?
could they have been radiographing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not radiograph?
could you not radiograph?
could she not radiograph?
could we not radiograph?
could you not radiograph?
could they not radiograph? 	could I not be radiographing?
could you not be radiographing?
could she not be radiographing?
could we not be radiographing?
could you not be radiographing?
could they not be radiographing? 	could I not have radiographed?
could you not have radiographed?
could she not have radiographed?
could we not have radiographed?
could you not have radiographed?
could they not have radiographed? 	could I not have been radiographing?
could you not have been radiographing?
could she not have been radiographing?
could we not have been radiographing?
could you not have been radiographing?
could they not have been radiographing?