ought to discover
Regular verb: discover - discovered- discovered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to discover
you ought to discover
she ought to discover
we ought to discover
you ought to discover
they ought to discover 	I ought to be discovering
you ought to be discovering
she ought to be discovering
we ought to be discovering
you ought to be discovering
they ought to be discovering	I ought to have discovered
you ought to have discovered
she ought to have discovered
we ought to have discovered
you ought to have discovered
they ought to have discovered	I ought to have been discovering
you ought to have been discovering
she ought to have been discovering
we ought to have been discovering
you ought to have been discovering
they ought to have been discovering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I oughtn't to discover
you oughtn't to discover
she oughtn't to discover
we oughtn't to discover
you oughtn't to discover
they oughtn't to discover 	I oughtn't to be discovering
you oughtn't to be discovering
she oughtn't to be discovering
we oughtn't to be discovering
you oughtn't to be discovering
they oughtn't to be discovering	I oughtn't to have discovered
you oughtn't to have discovered
she oughtn't to have discovered
we oughtn't to have discovered
you oughtn't to have discovered
they oughtn't to have discovered	I oughtn't to have been discovering
you oughtn't to have been discovering
she oughtn't to have been discovering
we oughtn't to have been discovering
you oughtn't to have been discovering
they oughtn't to have been discovering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I discover?
ought to you discover?
ought to she discover?
ought to we discover?
ought to you discover?
ought to they discover? 	ought to I be discovering?
ought to you be discovering?
ought to she be discovering?
ought to we be discovering?
ought to you be discovering?
ought to they be discovering? 	ought to I have discovered?
ought to you have discovered?
ought to she have discovered?
ought to we have discovered?
ought to you have discovered?
ought to they have discovered? 	ought to I have been discovering?
ought to you have been discovering?
ought to she have been discovering?
ought to we have been discovering?
ought to you have been discovering?
ought to they have been discovering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
oughtn't I to discover?
oughtn't you to discover?
oughtn't she to discover?
oughtn't we to discover?
oughtn't you to discover?
oughtn't they to discover? 	oughtn't I to be discovering?
oughtn't you to be discovering?
oughtn't she to be discovering?
oughtn't we to be discovering?
oughtn't you to be discovering?
oughtn't they to be discovering? 	oughtn't I to have discovered?
oughtn't you to have discovered?
oughtn't she to have discovered?
oughtn't we to have discovered?
oughtn't you to have discovered?
oughtn't they to have discovered? 	oughtn't I to have been discovering?
oughtn't you to have been discovering?
oughtn't she to have been discovering?
oughtn't we to have been discovering?
oughtn't you to have been discovering?
oughtn't they to have been discovering?