may stifle
Regular verb: stifle - stifled- stifled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may stifle
you may stifle
he may stifle
we may stifle
you may stifle
they may stifle 	I may be stifling
you may be stifling
he may be stifling
we may be stifling
you may be stifling
they may be stifling	I may have stifled
you may have stifled
he may have stifled
we may have stifled
you may have stifled
they may have stifled	I may have been stifling
you may have been stifling
he may have been stifling
we may have been stifling
you may have been stifling
they may have been stifling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may not stifle
you may not stifle
he may not stifle
we may not stifle
you may not stifle
they may not stifle 	I may not be stifling
you may not be stifling
he may not be stifling
we may not be stifling
you may not be stifling
they may not be stifling	I may not have stifled
you may not have stifled
he may not have stifled
we may not have stifled
you may not have stifled
they may not have stifled	I may not have been stifling
you may not have been stifling
he may not have been stifling
we may not have been stifling
you may not have been stifling
they may not have been stifling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I stifle?
may you stifle?
may he stifle?
may we stifle?
may you stifle?
may they stifle? 	may I be stifling?
may you be stifling?
may he be stifling?
may we be stifling?
may you be stifling?
may they be stifling? 	may I have stifled?
may you have stifled?
may he have stifled?
may we have stifled?
may you have stifled?
may they have stifled? 	may I have been stifling?
may you have been stifling?
may he have been stifling?
may we have been stifling?
may you have been stifling?
may they have been stifling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I not stifle?
may you not stifle?
may he not stifle?
may we not stifle?
may you not stifle?
may they not stifle? 	may I not be stifling?
may you not be stifling?
may he not be stifling?
may we not be stifling?
may you not be stifling?
may they not be stifling? 	may I not have stifled?
may you not have stifled?
may he not have stifled?
may we not have stifled?
may you not have stifled?
may they not have stifled? 	may I not have been stifling?
may you not have been stifling?
may he not have been stifling?
may we not have been stifling?
may you not have been stifling?
may they not have been stifling?