English verb conjugation
CAN PRESERVE

Regular verb: preserve - preserved - preserved

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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

Negation

Simple form	V-ing form
I can't preserve you can't preserve he can't preserve we can't preserve you can't preserve they can't preserve	I can't be preserving you can't be preserving he can't be preserving we can't be preserving you can't be preserving they can't be preserving
Perfect	V-ing perfect
I can't have preserved you can't have preserved he can't have preserved we can't have preserved you can't have preserved they can't have preserved	I can't have been preserving you can't have been preserving he can't have been preserving we can't have been preserving you can't have been preserving they can't have been preserving

Interrogative form

Simple form	V-ing form
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?
Perfect	V-ing perfect
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?

Interro-negative form

Simple form	V-ing form
can't I preserve? can't you preserve? can't he preserve? can't we preserve? can't you preserve? can't they preserve?	can't I be preserving? can't you be preserving? can't he be preserving? can't we be preserving? can't you be preserving? can't they be preserving?
Perfect	V-ing perfect
can't I have preserved? can't you have preserved? can't he have preserved? can't we have preserved? can't you have preserved? can't they have preserved?	can't I have been preserving? can't you have been preserving? can't he have been preserving? can't we have been preserving? can't you have been preserving? can't they have been preserving?