ought to preserve
Verbo regular: preserve - preserved- preserved

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I ought to preserve
you ought to preserve
she 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
she 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
she 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
she ought to have been preserving
we ought to have been preserving
you ought to have been preserving
they ought to have been preserving	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I ought not to preserve
you ought not to preserve
she 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
she 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
she 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
she 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 simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
ought to I preserve?
ought to you preserve?
ought to she 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 she 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 she 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 she 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 simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
ought I not to preserve?
ought you not to preserve?
ought she 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 she 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 she 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 she 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?