English verb conjugation
OUGHT TO CONTEND

Regular verb: contend - contended - contended

Affirmation

Simple form	V-ing form
I ought to contend you ought to contend she ought to contend we ought to contend you ought to contend they ought to contend	I ought to be contending you ought to be contending she ought to be contending we ought to be contending you ought to be contending they ought to be contending
Perfect	V-ing perfect
I ought to have contended you ought to have contended she ought to have contended we ought to have contended you ought to have contended they ought to have contended	I ought to have been contending you ought to have been contending she ought to have been contending we ought to have been contending you ought to have been contending they ought to have been contending

Negation

Simple form	V-ing form
I oughtn't to contend you oughtn't to contend she oughtn't to contend we oughtn't to contend you oughtn't to contend they oughtn't to contend	I oughtn't to be contending you oughtn't to be contending she oughtn't to be contending we oughtn't to be contending you oughtn't to be contending they oughtn't to be contending
Perfect	V-ing perfect
I oughtn't to have contended you oughtn't to have contended she oughtn't to have contended we oughtn't to have contended you oughtn't to have contended they oughtn't to have contended	I oughtn't to have been contending you oughtn't to have been contending she oughtn't to have been contending we oughtn't to have been contending you oughtn't to have been contending they oughtn't to have been contending

Interrogative form

Simple form	V-ing form
ought to I contend? ought to you contend? ought to she contend? ought to we contend? ought to you contend? ought to they contend?	ought to I be contending? ought to you be contending? ought to she be contending? ought to we be contending? ought to you be contending? ought to they be contending?
Perfect	V-ing perfect
ought to I have contended? ought to you have contended? ought to she have contended? ought to we have contended? ought to you have contended? ought to they have contended?	ought to I have been contending? ought to you have been contending? ought to she have been contending? ought to we have been contending? ought to you have been contending? ought to they have been contending?

Interro-negative form

Simple form	V-ing form
oughtn't I to contend? oughtn't you to contend? oughtn't she to contend? oughtn't we to contend? oughtn't you to contend? oughtn't they to contend?	oughtn't I to be contending? oughtn't you to be contending? oughtn't she to be contending? oughtn't we to be contending? oughtn't you to be contending? oughtn't they to be contending?
Perfect	V-ing perfect
oughtn't I to have contended? oughtn't you to have contended? oughtn't she to have contended? oughtn't we to have contended? oughtn't you to have contended? oughtn't they to have contended?	oughtn't I to have been contending? oughtn't you to have been contending? oughtn't she to have been contending? oughtn't we to have been contending? oughtn't you to have been contending? oughtn't they to have been contending?