ought to unlatch
Regular verb: unlatch - unlatched- unlatched

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to unlatch
you ought to unlatch
she ought to unlatch
we ought to unlatch
you ought to unlatch
they ought to unlatch 	I ought to be unlatching
you ought to be unlatching
she ought to be unlatching
we ought to be unlatching
you ought to be unlatching
they ought to be unlatching	I ought to have unlatched
you ought to have unlatched
she ought to have unlatched
we ought to have unlatched
you ought to have unlatched
they ought to have unlatched	I ought to have been unlatching
you ought to have been unlatching
she ought to have been unlatching
we ought to have been unlatching
you ought to have been unlatching
they ought to have been unlatching	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I oughtn't to unlatch
you oughtn't to unlatch
she oughtn't to unlatch
we oughtn't to unlatch
you oughtn't to unlatch
they oughtn't to unlatch 	I oughtn't to be unlatching
you oughtn't to be unlatching
she oughtn't to be unlatching
we oughtn't to be unlatching
you oughtn't to be unlatching
they oughtn't to be unlatching	I oughtn't to have unlatched
you oughtn't to have unlatched
she oughtn't to have unlatched
we oughtn't to have unlatched
you oughtn't to have unlatched
they oughtn't to have unlatched	I oughtn't to have been unlatching
you oughtn't to have been unlatching
she oughtn't to have been unlatching
we oughtn't to have been unlatching
you oughtn't to have been unlatching
they oughtn't to have been unlatching	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I unlatch?
ought to you unlatch?
ought to she unlatch?
ought to we unlatch?
ought to you unlatch?
ought to they unlatch? 	ought to I be unlatching?
ought to you be unlatching?
ought to she be unlatching?
ought to we be unlatching?
ought to you be unlatching?
ought to they be unlatching? 	ought to I have unlatched?
ought to you have unlatched?
ought to she have unlatched?
ought to we have unlatched?
ought to you have unlatched?
ought to they have unlatched? 	ought to I have been unlatching?
ought to you have been unlatching?
ought to she have been unlatching?
ought to we have been unlatching?
ought to you have been unlatching?
ought to they have been unlatching? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
oughtn't I to unlatch?
oughtn't you to unlatch?
oughtn't she to unlatch?
oughtn't we to unlatch?
oughtn't you to unlatch?
oughtn't they to unlatch? 	oughtn't I to be unlatching?
oughtn't you to be unlatching?
oughtn't she to be unlatching?
oughtn't we to be unlatching?
oughtn't you to be unlatching?
oughtn't they to be unlatching? 	oughtn't I to have unlatched?
oughtn't you to have unlatched?
oughtn't she to have unlatched?
oughtn't we to have unlatched?
oughtn't you to have unlatched?
oughtn't they to have unlatched? 	oughtn't I to have been unlatching?
oughtn't you to have been unlatching?
oughtn't she to have been unlatching?
oughtn't we to have been unlatching?
oughtn't you to have been unlatching?
oughtn't they to have been unlatching?