English verb conjugation
COULD RADIOGRAPH

Regular verb: radiograph - radiographed - radiographed

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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
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
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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?