Conjugación del verbo inglés
COULD PRESERVE

Verbo regular: preserve - preserved - preserved

Afirmación

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

Negación

Forma simple	Forma con V-ing
I couldn't preserve you couldn't preserve he couldn't preserve we couldn't preserve you couldn't preserve they couldn't preserve	I couldn't be preserving you couldn't be preserving he couldn't be preserving we couldn't be preserving you couldn't be preserving they couldn't be preserving
Perfecto	Perfecto con V-ing
I couldn't have preserved you couldn't have preserved he couldn't have preserved we couldn't have preserved you couldn't have preserved they couldn't have preserved	I couldn't have been preserving you couldn't have been preserving he couldn't have been preserving we couldn't have been preserving you couldn't have been preserving they couldn't have been preserving

Forma interrogativa

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

Forma interro-negativa

Forma simple	Forma con V-ing
couldn't I preserve? couldn't you preserve? couldn't he preserve? couldn't we preserve? couldn't you preserve? couldn't they preserve?	couldn't I be preserving? couldn't you be preserving? couldn't he be preserving? couldn't we be preserving? couldn't you be preserving? couldn't they be preserving?
Perfecto	Perfecto con V-ing
couldn't I have preserved? couldn't you have preserved? couldn't he have preserved? couldn't we have preserved? couldn't you have preserved? couldn't they have preserved?	couldn't I have been preserving? couldn't you have been preserving? couldn't he have been preserving? couldn't we have been preserving? couldn't you have been preserving? couldn't they have been preserving?