English verb conjugation
OUGHT TO CRAB

Regular verb: crab - crabbed - crabbed

Affirmation

Simple form	V-ing form
I ought to crab you ought to crab he ought to crab we ought to crab you ought to crab they ought to crab	I ought to be crabbing you ought to be crabbing he ought to be crabbing we ought to be crabbing you ought to be crabbing they ought to be crabbing
Perfect	V-ing perfect
I ought to have crabbed you ought to have crabbed he ought to have crabbed we ought to have crabbed you ought to have crabbed they ought to have crabbed	I ought to have been crabbing you ought to have been crabbing he ought to have been crabbing we ought to have been crabbing you ought to have been crabbing they ought to have been crabbing

Negation

Simple form	V-ing form
I oughtn't to crab you oughtn't to crab he oughtn't to crab we oughtn't to crab you oughtn't to crab they oughtn't to crab	I oughtn't to be crabbing you oughtn't to be crabbing he oughtn't to be crabbing we oughtn't to be crabbing you oughtn't to be crabbing they oughtn't to be crabbing
Perfect	V-ing perfect
I oughtn't to have crabbed you oughtn't to have crabbed he oughtn't to have crabbed we oughtn't to have crabbed you oughtn't to have crabbed they oughtn't to have crabbed	I oughtn't to have been crabbing you oughtn't to have been crabbing he oughtn't to have been crabbing we oughtn't to have been crabbing you oughtn't to have been crabbing they oughtn't to have been crabbing

Interrogative form

Simple form	V-ing form
ought to I crab? ought to you crab? ought to he crab? ought to we crab? ought to you crab? ought to they crab?	ought to I be crabbing? ought to you be crabbing? ought to he be crabbing? ought to we be crabbing? ought to you be crabbing? ought to they be crabbing?
Perfect	V-ing perfect
ought to I have crabbed? ought to you have crabbed? ought to he have crabbed? ought to we have crabbed? ought to you have crabbed? ought to they have crabbed?	ought to I have been crabbing? ought to you have been crabbing? ought to he have been crabbing? ought to we have been crabbing? ought to you have been crabbing? ought to they have been crabbing?

Interro-negative form

Simple form	V-ing form
oughtn't I to crab? oughtn't you to crab? oughtn't he to crab? oughtn't we to crab? oughtn't you to crab? oughtn't they to crab?	oughtn't I to be crabbing? oughtn't you to be crabbing? oughtn't he to be crabbing? oughtn't we to be crabbing? oughtn't you to be crabbing? oughtn't they to be crabbing?
Perfect	V-ing perfect
oughtn't I to have crabbed? oughtn't you to have crabbed? oughtn't he to have crabbed? oughtn't we to have crabbed? oughtn't you to have crabbed? oughtn't they to have crabbed?	oughtn't I to have been crabbing? oughtn't you to have been crabbing? oughtn't he to have been crabbing? oughtn't we to have been crabbing? oughtn't you to have been crabbing? oughtn't they to have been crabbing?