can preserve
Verbo regular: preserve - preserved- preserved

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can preserve
you can preserve
he can preserve
we can preserve
you can preserve
they can preserve 	I can be preserving
you can be preserving
he can be preserving
we can be preserving
you can be preserving
they can be preserving	I can have preserved
you can have preserved
he can have preserved
we can have preserved
you can have preserved
they can have preserved	I can have been preserving
you can have been preserving
he can have been preserving
we can have been preserving
you can have been preserving
they can have been preserving	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I cannot preserve
you cannot preserve
he cannot preserve
we cannot preserve
you cannot preserve
they cannot preserve 	I cannot be preserving
you cannot be preserving
he cannot be preserving
we cannot be preserving
you cannot be preserving
they cannot be preserving	I cannot have preserved
you cannot have preserved
he cannot have preserved
we cannot have preserved
you cannot have preserved
they cannot have preserved	I cannot have been preserving
you cannot have been preserving
he cannot have been preserving
we cannot have been preserving
you cannot have been preserving
they cannot have been preserving	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I preserve?
can you preserve?
can he preserve?
can we preserve?
can you preserve?
can they preserve? 	can I be preserving?
can you be preserving?
can he be preserving?
can we be preserving?
can you be preserving?
can they be preserving? 	can I have preserved?
can you have preserved?
can he have preserved?
can we have preserved?
can you have preserved?
can they have preserved? 	can I have been preserving?
can you have been preserving?
can he have been preserving?
can we have been preserving?
can you have been preserving?
can they have been preserving? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I not preserve?
can you not preserve?
can he not preserve?
can we not preserve?
can you not preserve?
can they not preserve? 	can I not be preserving?
can you not be preserving?
can he not be preserving?
can we not be preserving?
can you not be preserving?
can they not be preserving? 	can I not have preserved?
can you not have preserved?
can he not have preserved?
can we not have preserved?
can you not have preserved?
can they not have preserved? 	can I not have been preserving?
can you not have been preserving?
can he not have been preserving?
can we not have been preserving?
can you not have been preserving?
can they not have been preserving?