ought to maintain
Regular verb: maintain - maintained- maintained

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to maintain
you ought to maintain
she ought to maintain
we ought to maintain
you ought to maintain
they ought to maintain 	I ought to be maintaining
you ought to be maintaining
she ought to be maintaining
we ought to be maintaining
you ought to be maintaining
they ought to be maintaining	I ought to have maintained
you ought to have maintained
she ought to have maintained
we ought to have maintained
you ought to have maintained
they ought to have maintained	I ought to have been maintaining
you ought to have been maintaining
she ought to have been maintaining
we ought to have been maintaining
you ought to have been maintaining
they ought to have been maintaining	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I oughtn't to maintain
you oughtn't to maintain
she oughtn't to maintain
we oughtn't to maintain
you oughtn't to maintain
they oughtn't to maintain 	I oughtn't to be maintaining
you oughtn't to be maintaining
she oughtn't to be maintaining
we oughtn't to be maintaining
you oughtn't to be maintaining
they oughtn't to be maintaining	I oughtn't to have maintained
you oughtn't to have maintained
she oughtn't to have maintained
we oughtn't to have maintained
you oughtn't to have maintained
they oughtn't to have maintained	I oughtn't to have been maintaining
you oughtn't to have been maintaining
she oughtn't to have been maintaining
we oughtn't to have been maintaining
you oughtn't to have been maintaining
they oughtn't to have been maintaining	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I maintain?
ought to you maintain?
ought to she maintain?
ought to we maintain?
ought to you maintain?
ought to they maintain? 	ought to I be maintaining?
ought to you be maintaining?
ought to she be maintaining?
ought to we be maintaining?
ought to you be maintaining?
ought to they be maintaining? 	ought to I have maintained?
ought to you have maintained?
ought to she have maintained?
ought to we have maintained?
ought to you have maintained?
ought to they have maintained? 	ought to I have been maintaining?
ought to you have been maintaining?
ought to she have been maintaining?
ought to we have been maintaining?
ought to you have been maintaining?
ought to they have been maintaining? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
oughtn't I to maintain?
oughtn't you to maintain?
oughtn't she to maintain?
oughtn't we to maintain?
oughtn't you to maintain?
oughtn't they to maintain? 	oughtn't I to be maintaining?
oughtn't you to be maintaining?
oughtn't she to be maintaining?
oughtn't we to be maintaining?
oughtn't you to be maintaining?
oughtn't they to be maintaining? 	oughtn't I to have maintained?
oughtn't you to have maintained?
oughtn't she to have maintained?
oughtn't we to have maintained?
oughtn't you to have maintained?
oughtn't they to have maintained? 	oughtn't I to have been maintaining?
oughtn't you to have been maintaining?
oughtn't she to have been maintaining?
oughtn't we to have been maintaining?
oughtn't you to have been maintaining?
oughtn't they to have been maintaining?