ought to stud
Regular verb: stud - studded- studded

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to stud
you ought to stud
she ought to stud
we ought to stud
you ought to stud
they ought to stud 	I ought to be studding
you ought to be studding
she ought to be studding
we ought to be studding
you ought to be studding
they ought to be studding	I ought to have studded
you ought to have studded
she ought to have studded
we ought to have studded
you ought to have studded
they ought to have studded	I ought to have been studding
you ought to have been studding
she ought to have been studding
we ought to have been studding
you ought to have been studding
they ought to have been studding	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I oughtn't to stud
you oughtn't to stud
she oughtn't to stud
we oughtn't to stud
you oughtn't to stud
they oughtn't to stud 	I oughtn't to be studding
you oughtn't to be studding
she oughtn't to be studding
we oughtn't to be studding
you oughtn't to be studding
they oughtn't to be studding	I oughtn't to have studded
you oughtn't to have studded
she oughtn't to have studded
we oughtn't to have studded
you oughtn't to have studded
they oughtn't to have studded	I oughtn't to have been studding
you oughtn't to have been studding
she oughtn't to have been studding
we oughtn't to have been studding
you oughtn't to have been studding
they oughtn't to have been studding	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I stud?
ought to you stud?
ought to she stud?
ought to we stud?
ought to you stud?
ought to they stud? 	ought to I be studding?
ought to you be studding?
ought to she be studding?
ought to we be studding?
ought to you be studding?
ought to they be studding? 	ought to I have studded?
ought to you have studded?
ought to she have studded?
ought to we have studded?
ought to you have studded?
ought to they have studded? 	ought to I have been studding?
ought to you have been studding?
ought to she have been studding?
ought to we have been studding?
ought to you have been studding?
ought to they have been studding? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
oughtn't I to stud?
oughtn't you to stud?
oughtn't she to stud?
oughtn't we to stud?
oughtn't you to stud?
oughtn't they to stud? 	oughtn't I to be studding?
oughtn't you to be studding?
oughtn't she to be studding?
oughtn't we to be studding?
oughtn't you to be studding?
oughtn't they to be studding? 	oughtn't I to have studded?
oughtn't you to have studded?
oughtn't she to have studded?
oughtn't we to have studded?
oughtn't you to have studded?
oughtn't they to have studded? 	oughtn't I to have been studding?
oughtn't you to have been studding?
oughtn't she to have been studding?
oughtn't we to have been studding?
oughtn't you to have been studding?
oughtn't they to have been studding?