ought to sniff
Regular verb: sniff - sniffed- sniffed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to sniff
you ought to sniff
she ought to sniff
we ought to sniff
you ought to sniff
they ought to sniff 	I ought to be sniffing
you ought to be sniffing
she ought to be sniffing
we ought to be sniffing
you ought to be sniffing
they ought to be sniffing	I ought to have sniffed
you ought to have sniffed
she ought to have sniffed
we ought to have sniffed
you ought to have sniffed
they ought to have sniffed	I ought to have been sniffing
you ought to have been sniffing
she ought to have been sniffing
we ought to have been sniffing
you ought to have been sniffing
they ought to have been sniffing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I oughtn't to sniff
you oughtn't to sniff
she oughtn't to sniff
we oughtn't to sniff
you oughtn't to sniff
they oughtn't to sniff 	I oughtn't to be sniffing
you oughtn't to be sniffing
she oughtn't to be sniffing
we oughtn't to be sniffing
you oughtn't to be sniffing
they oughtn't to be sniffing	I oughtn't to have sniffed
you oughtn't to have sniffed
she oughtn't to have sniffed
we oughtn't to have sniffed
you oughtn't to have sniffed
they oughtn't to have sniffed	I oughtn't to have been sniffing
you oughtn't to have been sniffing
she oughtn't to have been sniffing
we oughtn't to have been sniffing
you oughtn't to have been sniffing
they oughtn't to have been sniffing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I sniff?
ought to you sniff?
ought to she sniff?
ought to we sniff?
ought to you sniff?
ought to they sniff? 	ought to I be sniffing?
ought to you be sniffing?
ought to she be sniffing?
ought to we be sniffing?
ought to you be sniffing?
ought to they be sniffing? 	ought to I have sniffed?
ought to you have sniffed?
ought to she have sniffed?
ought to we have sniffed?
ought to you have sniffed?
ought to they have sniffed? 	ought to I have been sniffing?
ought to you have been sniffing?
ought to she have been sniffing?
ought to we have been sniffing?
ought to you have been sniffing?
ought to they have been sniffing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
oughtn't I to sniff?
oughtn't you to sniff?
oughtn't she to sniff?
oughtn't we to sniff?
oughtn't you to sniff?
oughtn't they to sniff? 	oughtn't I to be sniffing?
oughtn't you to be sniffing?
oughtn't she to be sniffing?
oughtn't we to be sniffing?
oughtn't you to be sniffing?
oughtn't they to be sniffing? 	oughtn't I to have sniffed?
oughtn't you to have sniffed?
oughtn't she to have sniffed?
oughtn't we to have sniffed?
oughtn't you to have sniffed?
oughtn't they to have sniffed? 	oughtn't I to have been sniffing?
oughtn't you to have been sniffing?
oughtn't she to have been sniffing?
oughtn't we to have been sniffing?
oughtn't you to have been sniffing?
oughtn't they to have been sniffing?