ought to constrain
Regular verb: constrain - constrained- constrained

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to constrain
you ought to constrain
he ought to constrain
we ought to constrain
you ought to constrain
they ought to constrain 	I ought to be constraining
you ought to be constraining
he ought to be constraining
we ought to be constraining
you ought to be constraining
they ought to be constraining	I ought to have constrained
you ought to have constrained
he ought to have constrained
we ought to have constrained
you ought to have constrained
they ought to have constrained	I ought to have been constraining
you ought to have been constraining
he ought to have been constraining
we ought to have been constraining
you ought to have been constraining
they ought to have been constraining	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought not to constrain
you ought not to constrain
he ought not to constrain
we ought not to constrain
you ought not to constrain
they ought not to constrain 	I ought not to constraining
you ought not to constraining
he ought not to constraining
we ought not to constraining
you ought not to constraining
they ought not to constraining	I ought not to have constrained
you ought not to have constrained
he ought not to have constrained
we ought not to have constrained
you ought not to have constrained
they ought not to have constrained	I ought not to have been constraining
you ought not to have been constraining
he ought not to have been constraining
we ought not to have been constraining
you ought not to have been constraining
they ought not to have been constraining	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I constrain?
ought to you constrain?
ought to he constrain?
ought to we constrain?
ought to you constrain?
ought to they constrain? 	ought to I be constraining?
ought to you be constraining?
ought to he be constraining?
ought to we be constraining?
ought to you be constraining?
ought to they be constraining? 	ought to I have constrained?
ought to you have constrained?
ought to he have constrained?
ought to we have constrained?
ought to you have constrained?
ought to they have constrained? 	ought to I have been constraining?
ought to you have been constraining?
ought to he have been constraining?
ought to we have been constraining?
ought to you have been constraining?
ought to they have been constraining? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought I not to constrain?
ought you not to constrain?
ought he not to constrain?
ought we not to constrain?
ought you not to constrain?
ought they not to constrain? 	ought I not to be constraining?
ought you not to be constraining?
ought he not to be constraining?
ought we not to be constraining?
ought you not to be constraining?
ought they not to be constraining? 	ought I not to have constrained?
ought you not to have constrained?
ought he not to have constrained?
ought we not to have constrained?
ought you not to have constrained?
ought they not to have constrained? 	ought I not to have been constraining?
ought you not to have been constraining?
ought he not to have been constraining?
ought we not to have been constraining?
ought you not to have been constraining?
ought they not to have been constraining?