I can picnic you can picnic she can picnic we can picnic you can picnic they can picnic
V-ing form
I can be picnicing you can be picnicing she can be picnicing we can be picnicing you can be picnicing they can be picnicing
Perfect
I can have picniced you can have picniced she can have picniced we can have picniced you can have picniced they can have picniced
V-ing perfect
I can have been picnicing you can have been picnicing she can have been picnicing we can have been picnicing you can have been picnicing they can have been picnicing
Negation
Simple form
I cannot picnic you cannot picnic she cannot picnic we cannot picnic you cannot picnic they cannot picnic
V-ing form
I cannot be picnicing you cannot be picnicing she cannot be picnicing we cannot be picnicing you cannot be picnicing they cannot be picnicing
Perfect
I cannot have picniced you cannot have picniced she cannot have picniced we cannot have picniced you cannot have picniced they cannot have picniced
V-ing perfect
I cannot have been picnicing you cannot have been picnicing she cannot have been picnicing we cannot have been picnicing you cannot have been picnicing they cannot have been picnicing
Interrogative form
Simple form
can I picnic? can you picnic? can she picnic? can we picnic? can you picnic? can they picnic?
V-ing form
can I be picnicing? can you be picnicing? can she be picnicing? can we be picnicing? can you be picnicing? can they be picnicing?
Perfect
can I have picniced? can you have picniced? can she have picniced? can we have picniced? can you have picniced? can they have picniced?
V-ing perfect
can I have been picnicing? can you have been picnicing? can she have been picnicing? can we have been picnicing? can you have been picnicing? can they have been picnicing?
Interro-negative form
Simple form
can I not picnic? can you not picnic? can she not picnic? can we not picnic? can you not picnic? can they not picnic?
V-ing form
can I not be picnicing? can you not be picnicing? can she not be picnicing? can we not be picnicing? can you not be picnicing? can they not be picnicing?
Perfect
can I not have picniced? can you not have picniced? can she not have picniced? can we not have picniced? can you not have picniced? can they not have picniced?
V-ing perfect
can I not have been picnicing? can you not have been picnicing? can she not have been picnicing? can we not have been picnicing? can you not have been picnicing? can they not have been picnicing?