I can stall you can stall he can stall we can stall you can stall they can stall
V-ing form
I can be stalling you can be stalling he can be stalling we can be stalling you can be stalling they can be stalling
Perfect
I can have stalled you can have stalled he can have stalled we can have stalled you can have stalled they can have stalled
V-ing perfect
I can have been stalling you can have been stalling he can have been stalling we can have been stalling you can have been stalling they can have been stalling
Negation
Simple form
I can't stall you can't stall he can't stall we can't stall you can't stall they can't stall
V-ing form
I can't be stalling you can't be stalling he can't be stalling we can't be stalling you can't be stalling they can't be stalling
Perfect
I can't have stalled you can't have stalled he can't have stalled we can't have stalled you can't have stalled they can't have stalled
V-ing perfect
I can't have been stalling you can't have been stalling he can't have been stalling we can't have been stalling you can't have been stalling they can't have been stalling
Interrogative form
Simple form
can I stall? can you stall? can he stall? can we stall? can you stall? can they stall?
V-ing form
can I be stalling? can you be stalling? can he be stalling? can we be stalling? can you be stalling? can they be stalling?
Perfect
can I have stalled? can you have stalled? can he have stalled? can we have stalled? can you have stalled? can they have stalled?
V-ing perfect
can I have been stalling? can you have been stalling? can he have been stalling? can we have been stalling? can you have been stalling? can they have been stalling?
Interro-negative form
Simple form
can't I stall? can't you stall? can't he stall? can't we stall? can't you stall? can't they stall?
V-ing form
can't I be stalling? can't you be stalling? can't he be stalling? can't we be stalling? can't you be stalling? can't they be stalling?
Perfect
can't I have stalled? can't you have stalled? can't he have stalled? can't we have stalled? can't you have stalled? can't they have stalled?
V-ing perfect
can't I have been stalling? can't you have been stalling? can't he have been stalling? can't we have been stalling? can't you have been stalling? can't they have been stalling?