can smother
Regular verb: smother - smothered- smothered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can smother
you can smother
she can smother
we can smother
you can smother
they can smother 	I can be smothering
you can be smothering
she can be smothering
we can be smothering
you can be smothering
they can be smothering	I can have smothered
you can have smothered
she can have smothered
we can have smothered
you can have smothered
they can have smothered	I can have been smothering
you can have been smothering
she can have been smothering
we can have been smothering
you can have been smothering
they can have been smothering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot smother
you cannot smother
she cannot smother
we cannot smother
you cannot smother
they cannot smother 	I cannot be smothering
you cannot be smothering
she cannot be smothering
we cannot be smothering
you cannot be smothering
they cannot be smothering	I cannot have smothered
you cannot have smothered
she cannot have smothered
we cannot have smothered
you cannot have smothered
they cannot have smothered	I cannot have been smothering
you cannot have been smothering
she cannot have been smothering
we cannot have been smothering
you cannot have been smothering
they cannot have been smothering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I smother?
can you smother?
can she smother?
can we smother?
can you smother?
can they smother? 	can I be smothering?
can you be smothering?
can she be smothering?
can we be smothering?
can you be smothering?
can they be smothering? 	can I have smothered?
can you have smothered?
can she have smothered?
can we have smothered?
can you have smothered?
can they have smothered? 	can I have been smothering?
can you have been smothering?
can she have been smothering?
can we have been smothering?
can you have been smothering?
can they have been smothering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not smother?
can you not smother?
can she not smother?
can we not smother?
can you not smother?
can they not smother? 	can I not be smothering?
can you not be smothering?
can she not be smothering?
can we not be smothering?
can you not be smothering?
can they not be smothering? 	can I not have smothered?
can you not have smothered?
can she not have smothered?
can we not have smothered?
can you not have smothered?
can they not have smothered? 	can I not have been smothering?
can you not have been smothering?
can she not have been smothering?
can we not have been smothering?
can you not have been smothering?
can they not have been smothering?