I can inhale you can inhale he can inhale we can inhale you can inhale they can inhale
V-ing form
I can be inhaling you can be inhaling he can be inhaling we can be inhaling you can be inhaling they can be inhaling
Perfect
I can have inhaled you can have inhaled he can have inhaled we can have inhaled you can have inhaled they can have inhaled
V-ing perfect
I can have been inhaling you can have been inhaling he can have been inhaling we can have been inhaling you can have been inhaling they can have been inhaling
Negation
Simple form
I cannot inhale you cannot inhale he cannot inhale we cannot inhale you cannot inhale they cannot inhale
V-ing form
I cannot be inhaling you cannot be inhaling he cannot be inhaling we cannot be inhaling you cannot be inhaling they cannot be inhaling
Perfect
I cannot have inhaled you cannot have inhaled he cannot have inhaled we cannot have inhaled you cannot have inhaled they cannot have inhaled
V-ing perfect
I cannot have been inhaling you cannot have been inhaling he cannot have been inhaling we cannot have been inhaling you cannot have been inhaling they cannot have been inhaling
Interrogative form
Simple form
can I inhale? can you inhale? can he inhale? can we inhale? can you inhale? can they inhale?
V-ing form
can I be inhaling? can you be inhaling? can he be inhaling? can we be inhaling? can you be inhaling? can they be inhaling?
Perfect
can I have inhaled? can you have inhaled? can he have inhaled? can we have inhaled? can you have inhaled? can they have inhaled?
V-ing perfect
can I have been inhaling? can you have been inhaling? can he have been inhaling? can we have been inhaling? can you have been inhaling? can they have been inhaling?
Interro-negative form
Simple form
can I not inhale? can you not inhale? can he not inhale? can we not inhale? can you not inhale? can they not inhale?
V-ing form
can I not be inhaling? can you not be inhaling? can he not be inhaling? can we not be inhaling? can you not be inhaling? can they not be inhaling?
Perfect
can I not have inhaled? can you not have inhaled? can he not have inhaled? can we not have inhaled? can you not have inhaled? can they not have inhaled?
V-ing perfect
can I not have been inhaling? can you not have been inhaling? can he not have been inhaling? can we not have been inhaling? can you not have been inhaling? can they not have been inhaling?