I can berry you can berry he can berry we can berry you can berry they can berry
V-ing form
I can be berrying you can be berrying he can be berrying we can be berrying you can be berrying they can be berrying
Perfect
I can have berried you can have berried he can have berried we can have berried you can have berried they can have berried
V-ing perfect
I can have been berrying you can have been berrying he can have been berrying we can have been berrying you can have been berrying they can have been berrying
Negation
Simple form
I cannot berry you cannot berry he cannot berry we cannot berry you cannot berry they cannot berry
V-ing form
I cannot be berrying you cannot be berrying he cannot be berrying we cannot be berrying you cannot be berrying they cannot be berrying
Perfect
I cannot have berried you cannot have berried he cannot have berried we cannot have berried you cannot have berried they cannot have berried
V-ing perfect
I cannot have been berrying you cannot have been berrying he cannot have been berrying we cannot have been berrying you cannot have been berrying they cannot have been berrying
Interrogative form
Simple form
can I berry? can you berry? can he berry? can we berry? can you berry? can they berry?
V-ing form
can I be berrying? can you be berrying? can he be berrying? can we be berrying? can you be berrying? can they be berrying?
Perfect
can I have berried? can you have berried? can he have berried? can we have berried? can you have berried? can they have berried?
V-ing perfect
can I have been berrying? can you have been berrying? can he have been berrying? can we have been berrying? can you have been berrying? can they have been berrying?
Interro-negative form
Simple form
can I not berry? can you not berry? can he not berry? can we not berry? can you not berry? can they not berry?
V-ing form
can I not be berrying? can you not be berrying? can he not be berrying? can we not be berrying? can you not be berrying? can they not be berrying?
Perfect
can I not have berried? can you not have berried? can he not have berried? can we not have berried? can you not have berried? can they not have berried?
V-ing perfect
can I not have been berrying? can you not have been berrying? can he not have been berrying? can we not have been berrying? can you not have been berrying? can they not have been berrying?