English verb conjugation
OUGHT TO GRASS

Regular verb: grass - grassed - grassed

Affirmation

Simple form	V-ing form
I ought to grass you ought to grass he ought to grass we ought to grass you ought to grass they ought to grass	I ought to be grassing you ought to be grassing he ought to be grassing we ought to be grassing you ought to be grassing they ought to be grassing
Perfect	V-ing perfect
I ought to have grassed you ought to have grassed he ought to have grassed we ought to have grassed you ought to have grassed they ought to have grassed	I ought to have been grassing you ought to have been grassing he ought to have been grassing we ought to have been grassing you ought to have been grassing they ought to have been grassing

Negation

Simple form	V-ing form
I oughtn't to grass you oughtn't to grass he oughtn't to grass we oughtn't to grass you oughtn't to grass they oughtn't to grass	I oughtn't to be grassing you oughtn't to be grassing he oughtn't to be grassing we oughtn't to be grassing you oughtn't to be grassing they oughtn't to be grassing
Perfect	V-ing perfect
I oughtn't to have grassed you oughtn't to have grassed he oughtn't to have grassed we oughtn't to have grassed you oughtn't to have grassed they oughtn't to have grassed	I oughtn't to have been grassing you oughtn't to have been grassing he oughtn't to have been grassing we oughtn't to have been grassing you oughtn't to have been grassing they oughtn't to have been grassing

Interrogative form

Simple form	V-ing form
ought to I grass? ought to you grass? ought to he grass? ought to we grass? ought to you grass? ought to they grass?	ought to I be grassing? ought to you be grassing? ought to he be grassing? ought to we be grassing? ought to you be grassing? ought to they be grassing?
Perfect	V-ing perfect
ought to I have grassed? ought to you have grassed? ought to he have grassed? ought to we have grassed? ought to you have grassed? ought to they have grassed?	ought to I have been grassing? ought to you have been grassing? ought to he have been grassing? ought to we have been grassing? ought to you have been grassing? ought to they have been grassing?

Interro-negative form

Simple form	V-ing form
oughtn't I to grass? oughtn't you to grass? oughtn't he to grass? oughtn't we to grass? oughtn't you to grass? oughtn't they to grass?	oughtn't I to be grassing? oughtn't you to be grassing? oughtn't he to be grassing? oughtn't we to be grassing? oughtn't you to be grassing? oughtn't they to be grassing?
Perfect	V-ing perfect
oughtn't I to have grassed? oughtn't you to have grassed? oughtn't he to have grassed? oughtn't we to have grassed? oughtn't you to have grassed? oughtn't they to have grassed?	oughtn't I to have been grassing? oughtn't you to have been grassing? oughtn't he to have been grassing? oughtn't we to have been grassing? oughtn't you to have been grassing? oughtn't they to have been grassing?