may stall
Regular verb: stall - stalled- stalled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may stall
you may stall
she may stall
we may stall
you may stall
they may stall 	I may be stalling
you may be stalling
she may be stalling
we may be stalling
you may be stalling
they may be stalling	I may have stalled
you may have stalled
she may have stalled
we may have stalled
you may have stalled
they may have stalled	I may have been stalling
you may have been stalling
she may have been stalling
we may have been stalling
you may have been stalling
they may have been stalling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't stall
you mayn't stall
she mayn't stall
we mayn't stall
you mayn't stall
they mayn't stall 	I mayn't be stalling
you mayn't be stalling
she mayn't be stalling
we mayn't be stalling
you mayn't be stalling
they mayn't be stalling	I mayn't have stalled
you mayn't have stalled
she mayn't have stalled
we mayn't have stalled
you mayn't have stalled
they mayn't have stalled	I mayn't have been stalling
you mayn't have been stalling
she mayn't have been stalling
we mayn't have been stalling
you mayn't have been stalling
they mayn't have been stalling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I stall?
may you stall?
may she stall?
may we stall?
may you stall?
may they stall? 	may I be stalling?
may you be stalling?
may she be stalling?
may we be stalling?
may you be stalling?
may they be stalling? 	may I have stalled?
may you have stalled?
may she have stalled?
may we have stalled?
may you have stalled?
may they have stalled? 	may I have been stalling?
may you have been stalling?
may she have been stalling?
may we have been stalling?
may you have been stalling?
may they have been stalling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I stall?
mayn't you stall?
mayn't she stall?
mayn't we stall?
mayn't you stall?
mayn't they stall? 	mayn't I be stalling?
mayn't you be stalling?
mayn't she be stalling?
mayn't we be stalling?
mayn't you be stalling?
mayn't they be stalling? 	mayn't I have stalled?
mayn't you have stalled?
mayn't she have stalled?
mayn't we have stalled?
mayn't you have stalled?
mayn't they have stalled? 	mayn't I have been stalling?
mayn't you have been stalling?
mayn't she have been stalling?
mayn't we have been stalling?
mayn't you have been stalling?
mayn't they have been stalling?