ought to sheathe
Regular verb: sheathe - sheathed- sheathed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to sheathe
you ought to sheathe
he ought to sheathe
we ought to sheathe
you ought to sheathe
they ought to sheathe 	I ought to be sheathing
you ought to be sheathing
he ought to be sheathing
we ought to be sheathing
you ought to be sheathing
they ought to be sheathing	I ought to have sheathed
you ought to have sheathed
he ought to have sheathed
we ought to have sheathed
you ought to have sheathed
they ought to have sheathed	I ought to have been sheathing
you ought to have been sheathing
he ought to have been sheathing
we ought to have been sheathing
you ought to have been sheathing
they ought to have been sheathing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I oughtn't to sheathe
you oughtn't to sheathe
he oughtn't to sheathe
we oughtn't to sheathe
you oughtn't to sheathe
they oughtn't to sheathe 	I oughtn't to be sheathing
you oughtn't to be sheathing
he oughtn't to be sheathing
we oughtn't to be sheathing
you oughtn't to be sheathing
they oughtn't to be sheathing	I oughtn't to have sheathed
you oughtn't to have sheathed
he oughtn't to have sheathed
we oughtn't to have sheathed
you oughtn't to have sheathed
they oughtn't to have sheathed	I oughtn't to have been sheathing
you oughtn't to have been sheathing
he oughtn't to have been sheathing
we oughtn't to have been sheathing
you oughtn't to have been sheathing
they oughtn't to have been sheathing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I sheathe?
ought to you sheathe?
ought to he sheathe?
ought to we sheathe?
ought to you sheathe?
ought to they sheathe? 	ought to I be sheathing?
ought to you be sheathing?
ought to he be sheathing?
ought to we be sheathing?
ought to you be sheathing?
ought to they be sheathing? 	ought to I have sheathed?
ought to you have sheathed?
ought to he have sheathed?
ought to we have sheathed?
ought to you have sheathed?
ought to they have sheathed? 	ought to I have been sheathing?
ought to you have been sheathing?
ought to he have been sheathing?
ought to we have been sheathing?
ought to you have been sheathing?
ought to they have been sheathing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
oughtn't I to sheathe?
oughtn't you to sheathe?
oughtn't he to sheathe?
oughtn't we to sheathe?
oughtn't you to sheathe?
oughtn't they to sheathe? 	oughtn't I to be sheathing?
oughtn't you to be sheathing?
oughtn't he to be sheathing?
oughtn't we to be sheathing?
oughtn't you to be sheathing?
oughtn't they to be sheathing? 	oughtn't I to have sheathed?
oughtn't you to have sheathed?
oughtn't he to have sheathed?
oughtn't we to have sheathed?
oughtn't you to have sheathed?
oughtn't they to have sheathed? 	oughtn't I to have been sheathing?
oughtn't you to have been sheathing?
oughtn't he to have been sheathing?
oughtn't we to have been sheathing?
oughtn't you to have been sheathing?
oughtn't they to have been sheathing?