I can lucubrate you can lucubrate she can lucubrate we can lucubrate you can lucubrate they can lucubrate
V-ing form
I can be lucubrating you can be lucubrating she can be lucubrating we can be lucubrating you can be lucubrating they can be lucubrating
Perfect
I can have lucubrated you can have lucubrated she can have lucubrated we can have lucubrated you can have lucubrated they can have lucubrated
V-ing perfect
I can have been lucubrating you can have been lucubrating she can have been lucubrating we can have been lucubrating you can have been lucubrating they can have been lucubrating
Negation
Simple form
I can't lucubrate you can't lucubrate she can't lucubrate we can't lucubrate you can't lucubrate they can't lucubrate
V-ing form
I can't be lucubrating you can't be lucubrating she can't be lucubrating we can't be lucubrating you can't be lucubrating they can't be lucubrating
Perfect
I can't have lucubrated you can't have lucubrated she can't have lucubrated we can't have lucubrated you can't have lucubrated they can't have lucubrated
V-ing perfect
I can't have been lucubrating you can't have been lucubrating she can't have been lucubrating we can't have been lucubrating you can't have been lucubrating they can't have been lucubrating
Interrogative form
Simple form
can I lucubrate? can you lucubrate? can she lucubrate? can we lucubrate? can you lucubrate? can they lucubrate?
V-ing form
can I be lucubrating? can you be lucubrating? can she be lucubrating? can we be lucubrating? can you be lucubrating? can they be lucubrating?
Perfect
can I have lucubrated? can you have lucubrated? can she have lucubrated? can we have lucubrated? can you have lucubrated? can they have lucubrated?
V-ing perfect
can I have been lucubrating? can you have been lucubrating? can she have been lucubrating? can we have been lucubrating? can you have been lucubrating? can they have been lucubrating?
Interro-negative form
Simple form
can't I lucubrate? can't you lucubrate? can't she lucubrate? can't we lucubrate? can't you lucubrate? can't they lucubrate?
V-ing form
can't I be lucubrating? can't you be lucubrating? can't she be lucubrating? can't we be lucubrating? can't you be lucubrating? can't they be lucubrating?
Perfect
can't I have lucubrated? can't you have lucubrated? can't she have lucubrated? can't we have lucubrated? can't you have lucubrated? can't they have lucubrated?
V-ing perfect
can't I have been lucubrating? can't you have been lucubrating? can't she have been lucubrating? can't we have been lucubrating? can't you have been lucubrating? can't they have been lucubrating?