English verb conjugation
OUGHT TO SHELVE

Regular verb: shelve - shelved - shelved

Affirmation

Simple form	V-ing form
I ought to shelve you ought to shelve he ought to shelve we ought to shelve you ought to shelve they ought to shelve	I ought to be shelving you ought to be shelving he ought to be shelving we ought to be shelving you ought to be shelving they ought to be shelving
Perfect	V-ing perfect
I ought to have shelved you ought to have shelved he ought to have shelved we ought to have shelved you ought to have shelved they ought to have shelved	I ought to have been shelving you ought to have been shelving he ought to have been shelving we ought to have been shelving you ought to have been shelving they ought to have been shelving

Negation

Simple form	V-ing form
I oughtn't to shelve you oughtn't to shelve he oughtn't to shelve we oughtn't to shelve you oughtn't to shelve they oughtn't to shelve	I oughtn't to be shelving you oughtn't to be shelving he oughtn't to be shelving we oughtn't to be shelving you oughtn't to be shelving they oughtn't to be shelving
Perfect	V-ing perfect
I oughtn't to have shelved you oughtn't to have shelved he oughtn't to have shelved we oughtn't to have shelved you oughtn't to have shelved they oughtn't to have shelved	I oughtn't to have been shelving you oughtn't to have been shelving he oughtn't to have been shelving we oughtn't to have been shelving you oughtn't to have been shelving they oughtn't to have been shelving

Interrogative form

Simple form	V-ing form
ought to I shelve? ought to you shelve? ought to he shelve? ought to we shelve? ought to you shelve? ought to they shelve?	ought to I be shelving? ought to you be shelving? ought to he be shelving? ought to we be shelving? ought to you be shelving? ought to they be shelving?
Perfect	V-ing perfect
ought to I have shelved? ought to you have shelved? ought to he have shelved? ought to we have shelved? ought to you have shelved? ought to they have shelved?	ought to I have been shelving? ought to you have been shelving? ought to he have been shelving? ought to we have been shelving? ought to you have been shelving? ought to they have been shelving?

Interro-negative form

Simple form	V-ing form
oughtn't I to shelve? oughtn't you to shelve? oughtn't he to shelve? oughtn't we to shelve? oughtn't you to shelve? oughtn't they to shelve?	oughtn't I to be shelving? oughtn't you to be shelving? oughtn't he to be shelving? oughtn't we to be shelving? oughtn't you to be shelving? oughtn't they to be shelving?
Perfect	V-ing perfect
oughtn't I to have shelved? oughtn't you to have shelved? oughtn't he to have shelved? oughtn't we to have shelved? oughtn't you to have shelved? oughtn't they to have shelved?	oughtn't I to have been shelving? oughtn't you to have been shelving? oughtn't he to have been shelving? oughtn't we to have been shelving? oughtn't you to have been shelving? oughtn't they to have been shelving?