English verb conjugation
COULD DEVELOP

Regular verb: develop - developed - developed

Affirmation

Simple form	V-ing form
I could develop you could develop she could develop we could develop you could develop they could develop	I could be developing you could be developing she could be developing we could be developing you could be developing they could be developing
Perfect	V-ing perfect
I could have developed you could have developed she could have developed we could have developed you could have developed they could have developed	I could have been developing you could have been developing she could have been developing we could have been developing you could have been developing they could have been developing

Negation

Simple form	V-ing form
I could not develop you could not develop she could not develop we could not develop you could not develop they could not develop	I could not be developing you could not be developing she could not be developing we could not be developing you could not be developing they could not be developing
Perfect	V-ing perfect
I could not have developed you could not have developed she could not have developed we could not have developed you could not have developed they could not have developed	I could not have been developing you could not have been developing she could not have been developing we could not have been developing you could not have been developing they could not have been developing

Interrogative form

Simple form	V-ing form
could I develop? could you develop? could she develop? could we develop? could you develop? could they develop?	could I be developing? could you be developing? could she be developing? could we be developing? could you be developing? could they be developing?
Perfect	V-ing perfect
could I have developed? could you have developed? could she have developed? could we have developed? could you have developed? could they have developed?	could I have been developing? could you have been developing? could she have been developing? could we have been developing? could you have been developing? could they have been developing?

Interro-negative form

Simple form	V-ing form
could I not develop? could you not develop? could she not develop? could we not develop? could you not develop? could they not develop?	could I not be developing? could you not be developing? could she not be developing? could we not be developing? could you not be developing? could they not be developing?
Perfect	V-ing perfect
could I not have developed? could you not have developed? could she not have developed? could we not have developed? could you not have developed? could they not have developed?	could I not have been developing? could you not have been developing? could she not have been developing? could we not have been developing? could you not have been developing? could they not have been developing?