English verb conjugation
OUGHT TO CLENCH

Regular verb: clench - clenched - clenched

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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
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
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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?