can succumb
Regular verb: succumb - succumbed- succumbed

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

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't succumb
you can't succumb
she can't succumb
we can't succumb
you can't succumb
they can't succumb 	I can't be succumbing
you can't be succumbing
she can't be succumbing
we can't be succumbing
you can't be succumbing
they can't be succumbing	I can't have succumbed
you can't have succumbed
she can't have succumbed
we can't have succumbed
you can't have succumbed
they can't have succumbed	I can't have been succumbing
you can't have been succumbing
she can't have been succumbing
we can't have been succumbing
you can't have been succumbing
they can't have been succumbing	

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

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I succumb?
can't you succumb?
can't she succumb?
can't we succumb?
can't you succumb?
can't they succumb? 	can't I be succumbing?
can't you be succumbing?
can't she be succumbing?
can't we be succumbing?
can't you be succumbing?
can't they be succumbing? 	can't I have succumbed?
can't you have succumbed?
can't she have succumbed?
can't we have succumbed?
can't you have succumbed?
can't they have succumbed? 	can't I have been succumbing?
can't you have been succumbing?
can't she have been succumbing?
can't we have been succumbing?
can't you have been succumbing?
can't they have been succumbing?