I can dock you can dock he can dock we can dock you can dock they can dock
V-ing form
I can be docking you can be docking he can be docking we can be docking you can be docking they can be docking
Perfect
I can have docked you can have docked he can have docked we can have docked you can have docked they can have docked
V-ing perfect
I can have been docking you can have been docking he can have been docking we can have been docking you can have been docking they can have been docking
Negation
Simple form
I cannot dock you cannot dock he cannot dock we cannot dock you cannot dock they cannot dock
V-ing form
I cannot be docking you cannot be docking he cannot be docking we cannot be docking you cannot be docking they cannot be docking
Perfect
I cannot have docked you cannot have docked he cannot have docked we cannot have docked you cannot have docked they cannot have docked
V-ing perfect
I cannot have been docking you cannot have been docking he cannot have been docking we cannot have been docking you cannot have been docking they cannot have been docking
Interrogative form
Simple form
can I dock? can you dock? can he dock? can we dock? can you dock? can they dock?
V-ing form
can I be docking? can you be docking? can he be docking? can we be docking? can you be docking? can they be docking?
Perfect
can I have docked? can you have docked? can he have docked? can we have docked? can you have docked? can they have docked?
V-ing perfect
can I have been docking? can you have been docking? can he have been docking? can we have been docking? can you have been docking? can they have been docking?
Interro-negative form
Simple form
can I not dock? can you not dock? can he not dock? can we not dock? can you not dock? can they not dock?
V-ing form
can I not be docking? can you not be docking? can he not be docking? can we not be docking? can you not be docking? can they not be docking?
Perfect
can I not have docked? can you not have docked? can he not have docked? can we not have docked? can you not have docked? can they not have docked?
V-ing perfect
can I not have been docking? can you not have been docking? can he not have been docking? can we not have been docking? can you not have been docking? can they not have been docking?