I can double-lock you can double-lock he can double-lock we can double-lock you can double-lock they can double-lock
V-ing form
I can be double-locking you can be double-locking he can be double-locking we can be double-locking you can be double-locking they can be double-locking
Perfect
I can have double-locked you can have double-locked he can have double-locked we can have double-locked you can have double-locked they can have double-locked
V-ing perfect
I can have been double-locking you can have been double-locking he can have been double-locking we can have been double-locking you can have been double-locking they can have been double-locking
Negation
Simple form
I cannot double-lock you cannot double-lock he cannot double-lock we cannot double-lock you cannot double-lock they cannot double-lock
V-ing form
I cannot be double-locking you cannot be double-locking he cannot be double-locking we cannot be double-locking you cannot be double-locking they cannot be double-locking
Perfect
I cannot have double-locked you cannot have double-locked he cannot have double-locked we cannot have double-locked you cannot have double-locked they cannot have double-locked
V-ing perfect
I cannot have been double-locking you cannot have been double-locking he cannot have been double-locking we cannot have been double-locking you cannot have been double-locking they cannot have been double-locking
Interrogative form
Simple form
can I double-lock? can you double-lock? can he double-lock? can we double-lock? can you double-lock? can they double-lock?
V-ing form
can I be double-locking? can you be double-locking? can he be double-locking? can we be double-locking? can you be double-locking? can they be double-locking?
Perfect
can I have double-locked? can you have double-locked? can he have double-locked? can we have double-locked? can you have double-locked? can they have double-locked?
V-ing perfect
can I have been double-locking? can you have been double-locking? can he have been double-locking? can we have been double-locking? can you have been double-locking? can they have been double-locking?
Interro-negative form
Simple form
can I not double-lock? can you not double-lock? can he not double-lock? can we not double-lock? can you not double-lock? can they not double-lock?
V-ing form
can I not be double-locking? can you not be double-locking? can he not be double-locking? can we not be double-locking? can you not be double-locking? can they not be double-locking?
Perfect
can I not have double-locked? can you not have double-locked? can he not have double-locked? can we not have double-locked? can you not have double-locked? can they not have double-locked?
V-ing perfect
can I not have been double-locking? can you not have been double-locking? can he not have been double-locking? can we not have been double-locking? can you not have been double-locking? can they not have been double-locking?