English verb conjugation
OUGHT TO INVESTIGATE

Regular verb: investigate - investigated - investigated

Affirmation

Simple form	V-ing form
I ought to investigate you ought to investigate she ought to investigate we ought to investigate you ought to investigate they ought to investigate	I ought to be investigating you ought to be investigating she ought to be investigating we ought to be investigating you ought to be investigating they ought to be investigating
Perfect	V-ing perfect
I ought to have investigated you ought to have investigated she ought to have investigated we ought to have investigated you ought to have investigated they ought to have investigated	I ought to have been investigating you ought to have been investigating she ought to have been investigating we ought to have been investigating you ought to have been investigating they ought to have been investigating

Negation

Simple form	V-ing form
I oughtn't to investigate you oughtn't to investigate she oughtn't to investigate we oughtn't to investigate you oughtn't to investigate they oughtn't to investigate	I oughtn't to be investigating you oughtn't to be investigating she oughtn't to be investigating we oughtn't to be investigating you oughtn't to be investigating they oughtn't to be investigating
Perfect	V-ing perfect
I oughtn't to have investigated you oughtn't to have investigated she oughtn't to have investigated we oughtn't to have investigated you oughtn't to have investigated they oughtn't to have investigated	I oughtn't to have been investigating you oughtn't to have been investigating she oughtn't to have been investigating we oughtn't to have been investigating you oughtn't to have been investigating they oughtn't to have been investigating

Interrogative form

Simple form	V-ing form
ought to I investigate? ought to you investigate? ought to she investigate? ought to we investigate? ought to you investigate? ought to they investigate?	ought to I be investigating? ought to you be investigating? ought to she be investigating? ought to we be investigating? ought to you be investigating? ought to they be investigating?
Perfect	V-ing perfect
ought to I have investigated? ought to you have investigated? ought to she have investigated? ought to we have investigated? ought to you have investigated? ought to they have investigated?	ought to I have been investigating? ought to you have been investigating? ought to she have been investigating? ought to we have been investigating? ought to you have been investigating? ought to they have been investigating?

Interro-negative form

Simple form	V-ing form
oughtn't I to investigate? oughtn't you to investigate? oughtn't she to investigate? oughtn't we to investigate? oughtn't you to investigate? oughtn't they to investigate?	oughtn't I to be investigating? oughtn't you to be investigating? oughtn't she to be investigating? oughtn't we to be investigating? oughtn't you to be investigating? oughtn't they to be investigating?
Perfect	V-ing perfect
oughtn't I to have investigated? oughtn't you to have investigated? oughtn't she to have investigated? oughtn't we to have investigated? oughtn't you to have investigated? oughtn't they to have investigated?	oughtn't I to have been investigating? oughtn't you to have been investigating? oughtn't she to have been investigating? oughtn't we to have been investigating? oughtn't you to have been investigating? oughtn't they to have been investigating?