English verb conjugation
OUGHT TO CONTRIBUTE

Regular verb: contribute - contributed - contributed

Affirmation

Simple form	V-ing form
I ought to contribute you ought to contribute she ought to contribute we ought to contribute you ought to contribute they ought to contribute	I ought to be contributing you ought to be contributing she ought to be contributing we ought to be contributing you ought to be contributing they ought to be contributing
Perfect	V-ing perfect
I ought to have contributed you ought to have contributed she ought to have contributed we ought to have contributed you ought to have contributed they ought to have contributed	I ought to have been contributing you ought to have been contributing she ought to have been contributing we ought to have been contributing you ought to have been contributing they ought to have been contributing

Negation

Simple form	V-ing form
I ought not to contribute you ought not to contribute she ought not to contribute we ought not to contribute you ought not to contribute they ought not to contribute	I ought not to contributing you ought not to contributing she ought not to contributing we ought not to contributing you ought not to contributing they ought not to contributing
Perfect	V-ing perfect
I ought not to have contributed you ought not to have contributed she ought not to have contributed we ought not to have contributed you ought not to have contributed they ought not to have contributed	I ought not to have been contributing you ought not to have been contributing she ought not to have been contributing we ought not to have been contributing you ought not to have been contributing they ought not to have been contributing

Interrogative form

Simple form	V-ing form
ought to I contribute? ought to you contribute? ought to she contribute? ought to we contribute? ought to you contribute? ought to they contribute?	ought to I be contributing? ought to you be contributing? ought to she be contributing? ought to we be contributing? ought to you be contributing? ought to they be contributing?
Perfect	V-ing perfect
ought to I have contributed? ought to you have contributed? ought to she have contributed? ought to we have contributed? ought to you have contributed? ought to they have contributed?	ought to I have been contributing? ought to you have been contributing? ought to she have been contributing? ought to we have been contributing? ought to you have been contributing? ought to they have been contributing?

Interro-negative form

Simple form	V-ing form
ought I not to contribute? ought you not to contribute? ought she not to contribute? ought we not to contribute? ought you not to contribute? ought they not to contribute?	ought I not to be contributing? ought you not to be contributing? ought she not to be contributing? ought we not to be contributing? ought you not to be contributing? ought they not to be contributing?
Perfect	V-ing perfect
ought I not to have contributed? ought you not to have contributed? ought she not to have contributed? ought we not to have contributed? ought you not to have contributed? ought they not to have contributed?	ought I not to have been contributing? ought you not to have been contributing? ought she not to have been contributing? ought we not to have been contributing? ought you not to have been contributing? ought they not to have been contributing?