I can babysit you can babysit he can babysit we can babysit you can babysit they can babysit
V-ing form
I can be babysiting you can be babysiting he can be babysiting we can be babysiting you can be babysiting they can be babysiting
Perfect
I can have babysat you can have babysat he 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 he can have been babysiting we can have been babysiting you can have been babysiting they can have been babysiting
Negation
Simple form
I can't babysit you can't babysit he can't babysit we can't babysit you can't babysit they can't babysit
V-ing form
I can't be babysiting you can't be babysiting he can't be babysiting we can't be babysiting you can't be babysiting they can't be babysiting
Perfect
I can't have babysat you can't have babysat he can't have babysat we can't have babysat you can't have babysat they can't have babysat
V-ing perfect
I can't have been babysiting you can't have been babysiting he can't have been babysiting we can't have been babysiting you can't have been babysiting they can't have been babysiting
Interrogative form
Simple form
can I babysit? can you babysit? can he babysit? can we babysit? can you babysit? can they babysit?
V-ing form
can I be babysiting? can you be babysiting? can he be babysiting? can we be babysiting? can you be babysiting? can they be babysiting?
Perfect
can I have babysat? can you have babysat? can he 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 he have been babysiting? can we have been babysiting? can you have been babysiting? can they have been babysiting?
Interro-negative form
Simple form
can't I babysit? can't you babysit? can't he babysit? can't we babysit? can't you babysit? can't they babysit?
V-ing form
can't I be babysiting? can't you be babysiting? can't he be babysiting? can't we be babysiting? can't you be babysiting? can't they be babysiting?
Perfect
can't I have babysat? can't you have babysat? can't he have babysat? can't we have babysat? can't you have babysat? can't they have babysat?
V-ing perfect
can't I have been babysiting? can't you have been babysiting? can't he have been babysiting? can't we have been babysiting? can't you have been babysiting? can't they have been babysiting?