can stall
Regular verb: stall - stalled- stalled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can stall
you can stall
he can stall
we can stall
you can stall
they can stall 	I can be stalling
you can be stalling
he can be stalling
we can be stalling
you can be stalling
they can be stalling	I can have stalled
you can have stalled
he can have stalled
we can have stalled
you can have stalled
they can have stalled	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 	V-ing form 	Perfect 	V-ing perfect 	
I cannot stall
you cannot stall
he cannot stall
we cannot stall
you cannot stall
they cannot stall 	I cannot be stalling
you cannot be stalling
he cannot be stalling
we cannot be stalling
you cannot be stalling
they cannot be stalling	I cannot have stalled
you cannot have stalled
he cannot have stalled
we cannot have stalled
you cannot have stalled
they cannot have stalled	I cannot have been stalling
you cannot have been stalling
he cannot have been stalling
we cannot have been stalling
you cannot have been stalling
they cannot have been stalling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I stall?
can you stall?
can he stall?
can we stall?
can you stall?
can they stall? 	can I be stalling?
can you be stalling?
can he be stalling?
can we be stalling?
can you be stalling?
can they be stalling? 	can I have stalled?
can you have stalled?
can he have stalled?
can we have stalled?
can you have stalled?
can they have stalled? 	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 	V-ing form 	Perfect 	V-ing perfect 	
can I not stall?
can you not stall?
can he not stall?
can we not stall?
can you not stall?
can they not stall? 	can I not be stalling?
can you not be stalling?
can he not be stalling?
can we not be stalling?
can you not be stalling?
can they not be stalling? 	can I not have stalled?
can you not have stalled?
can he not have stalled?
can we not have stalled?
can you not have stalled?
can they not have stalled? 	can I not have been stalling?
can you not have been stalling?
can he not have been stalling?
can we not have been stalling?
can you not have been stalling?
can they not have been stalling?