I can lucubrate you can lucubrate he can lucubrate we can lucubrate you can lucubrate they can lucubrate
V-ing form
I can be lucubrating you can be lucubrating he can be lucubrating we can be lucubrating you can be lucubrating they can be lucubrating
Perfect
I can have lucubrated you can have lucubrated he 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 he can have been lucubrating we can have been lucubrating you can have been lucubrating they can have been lucubrating
Negation
Simple form
I cannot lucubrate you cannot lucubrate he cannot lucubrate we cannot lucubrate you cannot lucubrate they cannot lucubrate
V-ing form
I cannot be lucubrating you cannot be lucubrating he cannot be lucubrating we cannot be lucubrating you cannot be lucubrating they cannot be lucubrating
Perfect
I cannot have lucubrated you cannot have lucubrated he cannot have lucubrated we cannot have lucubrated you cannot have lucubrated they cannot have lucubrated
V-ing perfect
I cannot have been lucubrating you cannot have been lucubrating he cannot have been lucubrating we cannot have been lucubrating you cannot have been lucubrating they cannot have been lucubrating
Interrogative form
Simple form
can I lucubrate? can you lucubrate? can he lucubrate? can we lucubrate? can you lucubrate? can they lucubrate?
V-ing form
can I be lucubrating? can you be lucubrating? can he be lucubrating? can we be lucubrating? can you be lucubrating? can they be lucubrating?
Perfect
can I have lucubrated? can you have lucubrated? can he 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 he have been lucubrating? can we have been lucubrating? can you have been lucubrating? can they have been lucubrating?
Interro-negative form
Simple form
can I not lucubrate? can you not lucubrate? can he not lucubrate? can we not lucubrate? can you not lucubrate? can they not lucubrate?
V-ing form
can I not be lucubrating? can you not be lucubrating? can he not be lucubrating? can we not be lucubrating? can you not be lucubrating? can they not be lucubrating?
Perfect
can I not have lucubrated? can you not have lucubrated? can he not have lucubrated? can we not have lucubrated? can you not have lucubrated? can they not have lucubrated?
V-ing perfect
can I not have been lucubrating? can you not have been lucubrating? can he not have been lucubrating? can we not have been lucubrating? can you not have been lucubrating? can they not have been lucubrating?