English verb conjugation
OUGHT TO COUNTERSINK

Irregular verb: countersink - countersank - countersunk

Affirmation

Simple form	V-ing form
I ought to countersink you ought to countersink he ought to countersink we ought to countersink you ought to countersink they ought to countersink	I ought to be countersinking you ought to be countersinking he ought to be countersinking we ought to be countersinking you ought to be countersinking they ought to be countersinking
Perfect	V-ing perfect
I ought to have countersunk you ought to have countersunk he ought to have countersunk we ought to have countersunk you ought to have countersunk they ought to have countersunk	I ought to have been countersinking you ought to have been countersinking he ought to have been countersinking we ought to have been countersinking you ought to have been countersinking they ought to have been countersinking

Negation

Simple form	V-ing form
I oughtn't to countersink you oughtn't to countersink he oughtn't to countersink we oughtn't to countersink you oughtn't to countersink they oughtn't to countersink	I oughtn't to be countersinking you oughtn't to be countersinking he oughtn't to be countersinking we oughtn't to be countersinking you oughtn't to be countersinking they oughtn't to be countersinking
Perfect	V-ing perfect
I oughtn't to have countersunk you oughtn't to have countersunk he oughtn't to have countersunk we oughtn't to have countersunk you oughtn't to have countersunk they oughtn't to have countersunk	I oughtn't to have been countersinking you oughtn't to have been countersinking he oughtn't to have been countersinking we oughtn't to have been countersinking you oughtn't to have been countersinking they oughtn't to have been countersinking

Interrogative form

Simple form	V-ing form
ought to I countersink? ought to you countersink? ought to he countersink? ought to we countersink? ought to you countersink? ought to they countersink?	ought to I be countersinking? ought to you be countersinking? ought to he be countersinking? ought to we be countersinking? ought to you be countersinking? ought to they be countersinking?
Perfect	V-ing perfect
ought to I have countersunk? ought to you have countersunk? ought to he have countersunk? ought to we have countersunk? ought to you have countersunk? ought to they have countersunk?	ought to I have been countersinking? ought to you have been countersinking? ought to he have been countersinking? ought to we have been countersinking? ought to you have been countersinking? ought to they have been countersinking?

Interro-negative form

Simple form	V-ing form
oughtn't I to countersink? oughtn't you to countersink? oughtn't he to countersink? oughtn't we to countersink? oughtn't you to countersink? oughtn't they to countersink?	oughtn't I to be countersinking? oughtn't you to be countersinking? oughtn't he to be countersinking? oughtn't we to be countersinking? oughtn't you to be countersinking? oughtn't they to be countersinking?
Perfect	V-ing perfect
oughtn't I to have countersunk? oughtn't you to have countersunk? oughtn't he to have countersunk? oughtn't we to have countersunk? oughtn't you to have countersunk? oughtn't they to have countersunk?	oughtn't I to have been countersinking? oughtn't you to have been countersinking? oughtn't he to have been countersinking? oughtn't we to have been countersinking? oughtn't you to have been countersinking? oughtn't they to have been countersinking?