English verb conjugation
COULD LITHOGRAPH

Regular verb: lithograph - lithographed - lithographed

Affirmation

Simple form	V-ing form
I could lithograph you could lithograph he could lithograph we could lithograph you could lithograph they could lithograph	I could be lithographing you could be lithographing he could be lithographing we could be lithographing you could be lithographing they could be lithographing
Perfect	V-ing perfect
I could have lithographed you could have lithographed he could have lithographed we could have lithographed you could have lithographed they could have lithographed	I could have been lithographing you could have been lithographing he could have been lithographing we could have been lithographing you could have been lithographing they could have been lithographing

Negation

Simple form	V-ing form
I could not lithograph you could not lithograph he could not lithograph we could not lithograph you could not lithograph they could not lithograph	I could not be lithographing you could not be lithographing he could not be lithographing we could not be lithographing you could not be lithographing they could not be lithographing
Perfect	V-ing perfect
I could not have lithographed you could not have lithographed he could not have lithographed we could not have lithographed you could not have lithographed they could not have lithographed	I could not have been lithographing you could not have been lithographing he could not have been lithographing we could not have been lithographing you could not have been lithographing they could not have been lithographing

Interrogative form

Simple form	V-ing form
could I lithograph? could you lithograph? could he lithograph? could we lithograph? could you lithograph? could they lithograph?	could I be lithographing? could you be lithographing? could he be lithographing? could we be lithographing? could you be lithographing? could they be lithographing?
Perfect	V-ing perfect
could I have lithographed? could you have lithographed? could he have lithographed? could we have lithographed? could you have lithographed? could they have lithographed?	could I have been lithographing? could you have been lithographing? could he have been lithographing? could we have been lithographing? could you have been lithographing? could they have been lithographing?

Interro-negative form

Simple form	V-ing form
could I not lithograph? could you not lithograph? could he not lithograph? could we not lithograph? could you not lithograph? could they not lithograph?	could I not be lithographing? could you not be lithographing? could he not be lithographing? could we not be lithographing? could you not be lithographing? could they not be lithographing?
Perfect	V-ing perfect
could I not have lithographed? could you not have lithographed? could he not have lithographed? could we not have lithographed? could you not have lithographed? could they not have lithographed?	could I not have been lithographing? could you not have been lithographing? could he not have been lithographing? could we not have been lithographing? could you not have been lithographing? could they not have been lithographing?