I can babysit you can babysit she can babysit we can babysit you can babysit they can babysit
V-ing form
I can be babysiting you can be babysiting she can be babysiting we can be babysiting you can be babysiting they can be babysiting
Perfect
I can have babysat you can have babysat she can have babysat we can have babysat you can have babysat they can have babysat
V-ing perfect
I can have been babysiting you can have been babysiting she can have been babysiting we can have been babysiting you can have been babysiting they can have been babysiting
Negation
Simple form
I cannot babysit you cannot babysit she cannot babysit we cannot babysit you cannot babysit they cannot babysit
V-ing form
I cannot be babysiting you cannot be babysiting she cannot be babysiting we cannot be babysiting you cannot be babysiting they cannot be babysiting
Perfect
I cannot have babysat you cannot have babysat she cannot have babysat we cannot have babysat you cannot have babysat they cannot have babysat
V-ing perfect
I cannot have been babysiting you cannot have been babysiting she cannot have been babysiting we cannot have been babysiting you cannot have been babysiting they cannot have been babysiting
Interrogative form
Simple form
can I babysit? can you babysit? can she babysit? can we babysit? can you babysit? can they babysit?
V-ing form
can I be babysiting? can you be babysiting? can she be babysiting? can we be babysiting? can you be babysiting? can they be babysiting?
Perfect
can I have babysat? can you have babysat? can she have babysat? can we have babysat? can you have babysat? can they have babysat?
V-ing perfect
can I have been babysiting? can you have been babysiting? can she have been babysiting? can we have been babysiting? can you have been babysiting? can they have been babysiting?
Interro-negative form
Simple form
can I not babysit? can you not babysit? can she not babysit? can we not babysit? can you not babysit? can they not babysit?
V-ing form
can I not be babysiting? can you not be babysiting? can she not be babysiting? can we not be babysiting? can you not be babysiting? can they not be babysiting?
Perfect
can I not have babysat? can you not have babysat? can she not have babysat? can we not have babysat? can you not have babysat? can they not have babysat?
V-ing perfect
can I not have been babysiting? can you not have been babysiting? can she not have been babysiting? can we not have been babysiting? can you not have been babysiting? can they not have been babysiting?