ought to preascertain
Verbo regolare: preascertain - preascertained- preascertained

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I ought to preascertain
you ought to preascertain
he ought to preascertain
we ought to preascertain
you ought to preascertain
they ought to preascertain 	I ought to be preascertaining
you ought to be preascertaining
he ought to be preascertaining
we ought to be preascertaining
you ought to be preascertaining
they ought to be preascertaining	I ought to have preascertained
you ought to have preascertained
he ought to have preascertained
we ought to have preascertained
you ought to have preascertained
they ought to have preascertained	I ought to have been preascertaining
you ought to have been preascertaining
he ought to have been preascertaining
we ought to have been preascertaining
you ought to have been preascertaining
they ought to have been preascertaining	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I oughtn't to preascertain
you oughtn't to preascertain
he oughtn't to preascertain
we oughtn't to preascertain
you oughtn't to preascertain
they oughtn't to preascertain 	I oughtn't to be preascertaining
you oughtn't to be preascertaining
he oughtn't to be preascertaining
we oughtn't to be preascertaining
you oughtn't to be preascertaining
they oughtn't to be preascertaining	I oughtn't to have preascertained
you oughtn't to have preascertained
he oughtn't to have preascertained
we oughtn't to have preascertained
you oughtn't to have preascertained
they oughtn't to have preascertained	I oughtn't to have been preascertaining
you oughtn't to have been preascertaining
he oughtn't to have been preascertaining
we oughtn't to have been preascertaining
you oughtn't to have been preascertaining
they oughtn't to have been preascertaining	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
ought to I preascertain?
ought to you preascertain?
ought to he preascertain?
ought to we preascertain?
ought to you preascertain?
ought to they preascertain? 	ought to I be preascertaining?
ought to you be preascertaining?
ought to he be preascertaining?
ought to we be preascertaining?
ought to you be preascertaining?
ought to they be preascertaining? 	ought to I have preascertained?
ought to you have preascertained?
ought to he have preascertained?
ought to we have preascertained?
ought to you have preascertained?
ought to they have preascertained? 	ought to I have been preascertaining?
ought to you have been preascertaining?
ought to he have been preascertaining?
ought to we have been preascertaining?
ought to you have been preascertaining?
ought to they have been preascertaining? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
oughtn't I to preascertain?
oughtn't you to preascertain?
oughtn't he to preascertain?
oughtn't we to preascertain?
oughtn't you to preascertain?
oughtn't they to preascertain? 	oughtn't I to be preascertaining?
oughtn't you to be preascertaining?
oughtn't he to be preascertaining?
oughtn't we to be preascertaining?
oughtn't you to be preascertaining?
oughtn't they to be preascertaining? 	oughtn't I to have preascertained?
oughtn't you to have preascertained?
oughtn't he to have preascertained?
oughtn't we to have preascertained?
oughtn't you to have preascertained?
oughtn't they to have preascertained? 	oughtn't I to have been preascertaining?
oughtn't you to have been preascertaining?
oughtn't he to have been preascertaining?
oughtn't we to have been preascertaining?
oughtn't you to have been preascertaining?
oughtn't they to have been preascertaining?