ought to clench
Regular verb: clench - clenched- clenched

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to clench
you ought to clench
she ought to clench
we ought to clench
you ought to clench
they ought to clench 	I ought to be clenching
you ought to be clenching
she ought to be clenching
we ought to be clenching
you ought to be clenching
they ought to be clenching	I ought to have clenched
you ought to have clenched
she ought to have clenched
we ought to have clenched
you ought to have clenched
they ought to have clenched	I ought to have been clenching
you ought to have been clenching
she ought to have been clenching
we ought to have been clenching
you ought to have been clenching
they ought to have been clenching	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I oughtn't to clench
you oughtn't to clench
she oughtn't to clench
we oughtn't to clench
you oughtn't to clench
they oughtn't to clench 	I oughtn't to be clenching
you oughtn't to be clenching
she oughtn't to be clenching
we oughtn't to be clenching
you oughtn't to be clenching
they oughtn't to be clenching	I oughtn't to have clenched
you oughtn't to have clenched
she oughtn't to have clenched
we oughtn't to have clenched
you oughtn't to have clenched
they oughtn't to have clenched	I oughtn't to have been clenching
you oughtn't to have been clenching
she oughtn't to have been clenching
we oughtn't to have been clenching
you oughtn't to have been clenching
they oughtn't to have been clenching	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I clench?
ought to you clench?
ought to she clench?
ought to we clench?
ought to you clench?
ought to they clench? 	ought to I be clenching?
ought to you be clenching?
ought to she be clenching?
ought to we be clenching?
ought to you be clenching?
ought to they be clenching? 	ought to I have clenched?
ought to you have clenched?
ought to she have clenched?
ought to we have clenched?
ought to you have clenched?
ought to they have clenched? 	ought to I have been clenching?
ought to you have been clenching?
ought to she have been clenching?
ought to we have been clenching?
ought to you have been clenching?
ought to they have been clenching? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
oughtn't I to clench?
oughtn't you to clench?
oughtn't she to clench?
oughtn't we to clench?
oughtn't you to clench?
oughtn't they to clench? 	oughtn't I to be clenching?
oughtn't you to be clenching?
oughtn't she to be clenching?
oughtn't we to be clenching?
oughtn't you to be clenching?
oughtn't they to be clenching? 	oughtn't I to have clenched?
oughtn't you to have clenched?
oughtn't she to have clenched?
oughtn't we to have clenched?
oughtn't you to have clenched?
oughtn't they to have clenched? 	oughtn't I to have been clenching?
oughtn't you to have been clenching?
oughtn't she to have been clenching?
oughtn't we to have been clenching?
oughtn't you to have been clenching?
oughtn't they to have been clenching?