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 ought not to stud
you ought not to stud
she ought not to stud
we ought not to stud
you ought not to stud
they ought not to stud 	I ought not to studding
you ought not to studding
she ought not to studding
we ought not to studding
you ought not to studding
they ought not to studding	I ought not to have studded
you ought not to have studded
she ought not to have studded
we ought not to have studded
you ought not to have studded
they ought not to have studded	I ought not to have been studding
you ought not to have been studding
she ought not to have been studding
we ought not to have been studding
you ought not to have been studding
they ought not 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 	
ought I not to stud?
ought you not to stud?
ought she not to stud?
ought we not to stud?
ought you not to stud?
ought they not to stud? 	ought I not to be studding?
ought you not to be studding?
ought she not to be studding?
ought we not to be studding?
ought you not to be studding?
ought they not to be studding? 	ought I not to have studded?
ought you not to have studded?
ought she not to have studded?
ought we not to have studded?
ought you not to have studded?
ought they not to have studded? 	ought I not to have been studding?
ought you not to have been studding?
ought she not to have been studding?
ought we not to have been studding?
ought you not to have been studding?
ought they not to have been studding?