I can berry you can berry she can berry we can berry you can berry they can berry
V-ing form
I can be berrying you can be berrying she can be berrying we can be berrying you can be berrying they can be berrying
Perfect
I can have berried you can have berried she 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 she 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 she cannot berry we cannot berry you cannot berry they cannot berry
V-ing form
I cannot be berrying you cannot be berrying she cannot be berrying we cannot be berrying you cannot be berrying they cannot be berrying
Perfect
I cannot have berried you cannot have berried she 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 she 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 she berry? can we berry? can you berry? can they berry?
V-ing form
can I be berrying? can you be berrying? can she be berrying? can we be berrying? can you be berrying? can they be berrying?
Perfect
can I have berried? can you have berried? can she 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 she 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 she 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 she 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 she 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 she not have been berrying? can we not have been berrying? can you not have been berrying? can they not have been berrying?