may perturb
Regular verb: perturb - perturbed- perturbed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may perturb
you may perturb
he may perturb
we may perturb
you may perturb
they may perturb 	I may be perturbing
you may be perturbing
he may be perturbing
we may be perturbing
you may be perturbing
they may be perturbing	I may have perturbed
you may have perturbed
he may have perturbed
we may have perturbed
you may have perturbed
they may have perturbed	I may have been perturbing
you may have been perturbing
he may have been perturbing
we may have been perturbing
you may have been perturbing
they may have been perturbing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't perturb
you mayn't perturb
he mayn't perturb
we mayn't perturb
you mayn't perturb
they mayn't perturb 	I mayn't be perturbing
you mayn't be perturbing
he mayn't be perturbing
we mayn't be perturbing
you mayn't be perturbing
they mayn't be perturbing	I mayn't have perturbed
you mayn't have perturbed
he mayn't have perturbed
we mayn't have perturbed
you mayn't have perturbed
they mayn't have perturbed	I mayn't have been perturbing
you mayn't have been perturbing
he mayn't have been perturbing
we mayn't have been perturbing
you mayn't have been perturbing
they mayn't have been perturbing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I perturb?
may you perturb?
may he perturb?
may we perturb?
may you perturb?
may they perturb? 	may I be perturbing?
may you be perturbing?
may he be perturbing?
may we be perturbing?
may you be perturbing?
may they be perturbing? 	may I have perturbed?
may you have perturbed?
may he have perturbed?
may we have perturbed?
may you have perturbed?
may they have perturbed? 	may I have been perturbing?
may you have been perturbing?
may he have been perturbing?
may we have been perturbing?
may you have been perturbing?
may they have been perturbing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I perturb?
mayn't you perturb?
mayn't he perturb?
mayn't we perturb?
mayn't you perturb?
mayn't they perturb? 	mayn't I be perturbing?
mayn't you be perturbing?
mayn't he be perturbing?
mayn't we be perturbing?
mayn't you be perturbing?
mayn't they be perturbing? 	mayn't I have perturbed?
mayn't you have perturbed?
mayn't he have perturbed?
mayn't we have perturbed?
mayn't you have perturbed?
mayn't they have perturbed? 	mayn't I have been perturbing?
mayn't you have been perturbing?
mayn't he have been perturbing?
mayn't we have been perturbing?
mayn't you have been perturbing?
mayn't they have been perturbing?