ought to preserve
Verbo regolare: preserve - preserved- preserved

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I ought to preserve
you ought to preserve
he ought to preserve
we ought to preserve
you ought to preserve
they ought to preserve 	I ought to be preserving
you ought to be preserving
he ought to be preserving
we ought to be preserving
you ought to be preserving
they ought to be preserving	I ought to have preserved
you ought to have preserved
he ought to have preserved
we ought to have preserved
you ought to have preserved
they ought to have preserved	I ought to have been preserving
you ought to have been preserving
he ought to have been preserving
we ought to have been preserving
you ought to have been preserving
they ought to have been preserving	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I ought not to preserve
you ought not to preserve
he ought not to preserve
we ought not to preserve
you ought not to preserve
they ought not to preserve 	I ought not to preserving
you ought not to preserving
he ought not to preserving
we ought not to preserving
you ought not to preserving
they ought not to preserving	I ought not to have preserved
you ought not to have preserved
he ought not to have preserved
we ought not to have preserved
you ought not to have preserved
they ought not to have preserved	I ought not to have been preserving
you ought not to have been preserving
he ought not to have been preserving
we ought not to have been preserving
you ought not to have been preserving
they ought not to have been preserving	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
ought to I preserve?
ought to you preserve?
ought to he preserve?
ought to we preserve?
ought to you preserve?
ought to they preserve? 	ought to I be preserving?
ought to you be preserving?
ought to he be preserving?
ought to we be preserving?
ought to you be preserving?
ought to they be preserving? 	ought to I have preserved?
ought to you have preserved?
ought to he have preserved?
ought to we have preserved?
ought to you have preserved?
ought to they have preserved? 	ought to I have been preserving?
ought to you have been preserving?
ought to he have been preserving?
ought to we have been preserving?
ought to you have been preserving?
ought to they have been preserving? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
ought I not to preserve?
ought you not to preserve?
ought he not to preserve?
ought we not to preserve?
ought you not to preserve?
ought they not to preserve? 	ought I not to be preserving?
ought you not to be preserving?
ought he not to be preserving?
ought we not to be preserving?
ought you not to be preserving?
ought they not to be preserving? 	ought I not to have preserved?
ought you not to have preserved?
ought he not to have preserved?
ought we not to have preserved?
ought you not to have preserved?
ought they not to have preserved? 	ought I not to have been preserving?
ought you not to have been preserving?
ought he not to have been preserving?
ought we not to have been preserving?
ought you not to have been preserving?
ought they not to have been preserving?