may succumb
Regular verb: succumb - succumbed- succumbed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may succumb
you may succumb
he may succumb
we may succumb
you may succumb
they may succumb 	I may be succumbing
you may be succumbing
he may be succumbing
we may be succumbing
you may be succumbing
they may be succumbing	I may have succumbed
you may have succumbed
he may have succumbed
we may have succumbed
you may have succumbed
they may have succumbed	I may have been succumbing
you may have been succumbing
he may have been succumbing
we may have been succumbing
you may have been succumbing
they may have been succumbing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may not succumb
you may not succumb
he may not succumb
we may not succumb
you may not succumb
they may not succumb 	I may not be succumbing
you may not be succumbing
he may not be succumbing
we may not be succumbing
you may not be succumbing
they may not be succumbing	I may not have succumbed
you may not have succumbed
he may not have succumbed
we may not have succumbed
you may not have succumbed
they may not have succumbed	I may not have been succumbing
you may not have been succumbing
he may not have been succumbing
we may not have been succumbing
you may not have been succumbing
they may not have been succumbing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I succumb?
may you succumb?
may he succumb?
may we succumb?
may you succumb?
may they succumb? 	may I be succumbing?
may you be succumbing?
may he be succumbing?
may we be succumbing?
may you be succumbing?
may they be succumbing? 	may I have succumbed?
may you have succumbed?
may he have succumbed?
may we have succumbed?
may you have succumbed?
may they have succumbed? 	may I have been succumbing?
may you have been succumbing?
may he have been succumbing?
may we have been succumbing?
may you have been succumbing?
may they have been succumbing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I not succumb?
may you not succumb?
may he not succumb?
may we not succumb?
may you not succumb?
may they not succumb? 	may I not be succumbing?
may you not be succumbing?
may he not be succumbing?
may we not be succumbing?
may you not be succumbing?
may they not be succumbing? 	may I not have succumbed?
may you not have succumbed?
may he not have succumbed?
may we not have succumbed?
may you not have succumbed?
may they not have succumbed? 	may I not have been succumbing?
may you not have been succumbing?
may he not have been succumbing?
may we not have been succumbing?
may you not have been succumbing?
may they not have been succumbing?