English verb conjugation
COULD RADIOGRAPH

Regular verb: radiograph - radiographed - radiographed

Affirmation

Simple form	V-ing form
I could radiograph you could radiograph he could radiograph we could radiograph you could radiograph they could radiograph	I could be radiographing you could be radiographing he 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 he 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 he 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 couldn't radiograph you couldn't radiograph he couldn't radiograph we couldn't radiograph you couldn't radiograph they couldn't radiograph	I couldn't be radiographing you couldn't be radiographing he couldn't be radiographing we couldn't be radiographing you couldn't be radiographing they couldn't be radiographing
Perfect	V-ing perfect
I couldn't have radiographed you couldn't have radiographed he couldn't have radiographed we couldn't have radiographed you couldn't have radiographed they couldn't have radiographed	I couldn't have been radiographing you couldn't have been radiographing he couldn't have been radiographing we couldn't have been radiographing you couldn't have been radiographing they couldn't have been radiographing

Interrogative form

Simple form	V-ing form
could I radiograph? could you radiograph? could he radiograph? could we radiograph? could you radiograph? could they radiograph?	could I be radiographing? could you be radiographing? could he 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 he 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 he 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
couldn't I radiograph? couldn't you radiograph? couldn't he radiograph? couldn't we radiograph? couldn't you radiograph? couldn't they radiograph?	couldn't I be radiographing? couldn't you be radiographing? couldn't he be radiographing? couldn't we be radiographing? couldn't you be radiographing? couldn't they be radiographing?
Perfect	V-ing perfect
couldn't I have radiographed? couldn't you have radiographed? couldn't he have radiographed? couldn't we have radiographed? couldn't you have radiographed? couldn't they have radiographed?	couldn't I have been radiographing? couldn't you have been radiographing? couldn't he have been radiographing? couldn't we have been radiographing? couldn't you have been radiographing? couldn't they have been radiographing?