can stifle
Verbo regular: stifle - stifled- stifled

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can stifle
you can stifle
he can stifle
we can stifle
you can stifle
they can stifle 	I can be stifling
you can be stifling
he can be stifling
we can be stifling
you can be stifling
they can be stifling	I can have stifled
you can have stifled
he can have stifled
we can have stifled
you can have stifled
they can have stifled	I can have been stifling
you can have been stifling
he can have been stifling
we can have been stifling
you can have been stifling
they can have been stifling	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I cannot stifle
you cannot stifle
he cannot stifle
we cannot stifle
you cannot stifle
they cannot stifle 	I cannot be stifling
you cannot be stifling
he cannot be stifling
we cannot be stifling
you cannot be stifling
they cannot be stifling	I cannot have stifled
you cannot have stifled
he cannot have stifled
we cannot have stifled
you cannot have stifled
they cannot have stifled	I cannot have been stifling
you cannot have been stifling
he cannot have been stifling
we cannot have been stifling
you cannot have been stifling
they cannot have been stifling	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I stifle?
can you stifle?
can he stifle?
can we stifle?
can you stifle?
can they stifle? 	can I be stifling?
can you be stifling?
can he be stifling?
can we be stifling?
can you be stifling?
can they be stifling? 	can I have stifled?
can you have stifled?
can he have stifled?
can we have stifled?
can you have stifled?
can they have stifled? 	can I have been stifling?
can you have been stifling?
can he have been stifling?
can we have been stifling?
can you have been stifling?
can they have been stifling? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I not stifle?
can you not stifle?
can he not stifle?
can we not stifle?
can you not stifle?
can they not stifle? 	can I not be stifling?
can you not be stifling?
can he not be stifling?
can we not be stifling?
can you not be stifling?
can they not be stifling? 	can I not have stifled?
can you not have stifled?
can he not have stifled?
can we not have stifled?
can you not have stifled?
can they not have stifled? 	can I not have been stifling?
can you not have been stifling?
can he not have been stifling?
can we not have been stifling?
can you not have been stifling?
can they not have been stifling?