ought to check
Regular verb: check - checked- checked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to check
you ought to check
she ought to check
we ought to check
you ought to check
they ought to check 	I ought to be checking
you ought to be checking
she ought to be checking
we ought to be checking
you ought to be checking
they ought to be checking	I ought to have checked
you ought to have checked
she ought to have checked
we ought to have checked
you ought to have checked
they ought to have checked	I ought to have been checking
you ought to have been checking
she ought to have been checking
we ought to have been checking
you ought to have been checking
they ought to have been checking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I oughtn't to check
you oughtn't to check
she oughtn't to check
we oughtn't to check
you oughtn't to check
they oughtn't to check 	I oughtn't to be checking
you oughtn't to be checking
she oughtn't to be checking
we oughtn't to be checking
you oughtn't to be checking
they oughtn't to be checking	I oughtn't to have checked
you oughtn't to have checked
she oughtn't to have checked
we oughtn't to have checked
you oughtn't to have checked
they oughtn't to have checked	I oughtn't to have been checking
you oughtn't to have been checking
she oughtn't to have been checking
we oughtn't to have been checking
you oughtn't to have been checking
they oughtn't to have been checking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I check?
ought to you check?
ought to she check?
ought to we check?
ought to you check?
ought to they check? 	ought to I be checking?
ought to you be checking?
ought to she be checking?
ought to we be checking?
ought to you be checking?
ought to they be checking? 	ought to I have checked?
ought to you have checked?
ought to she have checked?
ought to we have checked?
ought to you have checked?
ought to they have checked? 	ought to I have been checking?
ought to you have been checking?
ought to she have been checking?
ought to we have been checking?
ought to you have been checking?
ought to they have been checking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
oughtn't I to check?
oughtn't you to check?
oughtn't she to check?
oughtn't we to check?
oughtn't you to check?
oughtn't they to check? 	oughtn't I to be checking?
oughtn't you to be checking?
oughtn't she to be checking?
oughtn't we to be checking?
oughtn't you to be checking?
oughtn't they to be checking? 	oughtn't I to have checked?
oughtn't you to have checked?
oughtn't she to have checked?
oughtn't we to have checked?
oughtn't you to have checked?
oughtn't they to have checked? 	oughtn't I to have been checking?
oughtn't you to have been checking?
oughtn't she to have been checking?
oughtn't we to have been checking?
oughtn't you to have been checking?
oughtn't they to have been checking?