ought to interrogate
Regular verb: interrogate - interrogated- interrogated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to interrogate
you ought to interrogate
he ought to interrogate
we ought to interrogate
you ought to interrogate
they ought to interrogate 	I ought to be interrogating
you ought to be interrogating
he ought to be interrogating
we ought to be interrogating
you ought to be interrogating
they ought to be interrogating	I ought to have interrogated
you ought to have interrogated
he ought to have interrogated
we ought to have interrogated
you ought to have interrogated
they ought to have interrogated	I ought to have been interrogating
you ought to have been interrogating
he ought to have been interrogating
we ought to have been interrogating
you ought to have been interrogating
they ought to have been interrogating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I oughtn't to interrogate
you oughtn't to interrogate
he oughtn't to interrogate
we oughtn't to interrogate
you oughtn't to interrogate
they oughtn't to interrogate 	I oughtn't to be interrogating
you oughtn't to be interrogating
he oughtn't to be interrogating
we oughtn't to be interrogating
you oughtn't to be interrogating
they oughtn't to be interrogating	I oughtn't to have interrogated
you oughtn't to have interrogated
he oughtn't to have interrogated
we oughtn't to have interrogated
you oughtn't to have interrogated
they oughtn't to have interrogated	I oughtn't to have been interrogating
you oughtn't to have been interrogating
he oughtn't to have been interrogating
we oughtn't to have been interrogating
you oughtn't to have been interrogating
they oughtn't to have been interrogating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I interrogate?
ought to you interrogate?
ought to he interrogate?
ought to we interrogate?
ought to you interrogate?
ought to they interrogate? 	ought to I be interrogating?
ought to you be interrogating?
ought to he be interrogating?
ought to we be interrogating?
ought to you be interrogating?
ought to they be interrogating? 	ought to I have interrogated?
ought to you have interrogated?
ought to he have interrogated?
ought to we have interrogated?
ought to you have interrogated?
ought to they have interrogated? 	ought to I have been interrogating?
ought to you have been interrogating?
ought to he have been interrogating?
ought to we have been interrogating?
ought to you have been interrogating?
ought to they have been interrogating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
oughtn't I to interrogate?
oughtn't you to interrogate?
oughtn't he to interrogate?
oughtn't we to interrogate?
oughtn't you to interrogate?
oughtn't they to interrogate? 	oughtn't I to be interrogating?
oughtn't you to be interrogating?
oughtn't he to be interrogating?
oughtn't we to be interrogating?
oughtn't you to be interrogating?
oughtn't they to be interrogating? 	oughtn't I to have interrogated?
oughtn't you to have interrogated?
oughtn't he to have interrogated?
oughtn't we to have interrogated?
oughtn't you to have interrogated?
oughtn't they to have interrogated? 	oughtn't I to have been interrogating?
oughtn't you to have been interrogating?
oughtn't he to have been interrogating?
oughtn't we to have been interrogating?
oughtn't you to have been interrogating?
oughtn't they to have been interrogating?