ought to quack
Regular verb: quack - quacked- quacked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to quack
you ought to quack
she ought to quack
we ought to quack
you ought to quack
they ought to quack 	I ought to be quacking
you ought to be quacking
she ought to be quacking
we ought to be quacking
you ought to be quacking
they ought to be quacking	I ought to have quacked
you ought to have quacked
she ought to have quacked
we ought to have quacked
you ought to have quacked
they ought to have quacked	I ought to have been quacking
you ought to have been quacking
she ought to have been quacking
we ought to have been quacking
you ought to have been quacking
they ought to have been quacking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I oughtn't to quack
you oughtn't to quack
she oughtn't to quack
we oughtn't to quack
you oughtn't to quack
they oughtn't to quack 	I oughtn't to be quacking
you oughtn't to be quacking
she oughtn't to be quacking
we oughtn't to be quacking
you oughtn't to be quacking
they oughtn't to be quacking	I oughtn't to have quacked
you oughtn't to have quacked
she oughtn't to have quacked
we oughtn't to have quacked
you oughtn't to have quacked
they oughtn't to have quacked	I oughtn't to have been quacking
you oughtn't to have been quacking
she oughtn't to have been quacking
we oughtn't to have been quacking
you oughtn't to have been quacking
they oughtn't to have been quacking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I quack?
ought to you quack?
ought to she quack?
ought to we quack?
ought to you quack?
ought to they quack? 	ought to I be quacking?
ought to you be quacking?
ought to she be quacking?
ought to we be quacking?
ought to you be quacking?
ought to they be quacking? 	ought to I have quacked?
ought to you have quacked?
ought to she have quacked?
ought to we have quacked?
ought to you have quacked?
ought to they have quacked? 	ought to I have been quacking?
ought to you have been quacking?
ought to she have been quacking?
ought to we have been quacking?
ought to you have been quacking?
ought to they have been quacking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
oughtn't I to quack?
oughtn't you to quack?
oughtn't she to quack?
oughtn't we to quack?
oughtn't you to quack?
oughtn't they to quack? 	oughtn't I to be quacking?
oughtn't you to be quacking?
oughtn't she to be quacking?
oughtn't we to be quacking?
oughtn't you to be quacking?
oughtn't they to be quacking? 	oughtn't I to have quacked?
oughtn't you to have quacked?
oughtn't she to have quacked?
oughtn't we to have quacked?
oughtn't you to have quacked?
oughtn't they to have quacked? 	oughtn't I to have been quacking?
oughtn't you to have been quacking?
oughtn't she to have been quacking?
oughtn't we to have been quacking?
oughtn't you to have been quacking?
oughtn't they to have been quacking?