can undertain
Verbo regular: undertain - undertained- undertained

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can undertain
you can undertain
he can undertain
we can undertain
you can undertain
they can undertain 	I can be undertaining
you can be undertaining
he can be undertaining
we can be undertaining
you can be undertaining
they can be undertaining	I can have undertained
you can have undertained
he can have undertained
we can have undertained
you can have undertained
they can have undertained	I can have been undertaining
you can have been undertaining
he can have been undertaining
we can have been undertaining
you can have been undertaining
they can have been undertaining	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can't undertain
you can't undertain
he can't undertain
we can't undertain
you can't undertain
they can't undertain 	I can't be undertaining
you can't be undertaining
he can't be undertaining
we can't be undertaining
you can't be undertaining
they can't be undertaining	I can't have undertained
you can't have undertained
he can't have undertained
we can't have undertained
you can't have undertained
they can't have undertained	I can't have been undertaining
you can't have been undertaining
he can't have been undertaining
we can't have been undertaining
you can't have been undertaining
they can't have been undertaining	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I undertain?
can you undertain?
can he undertain?
can we undertain?
can you undertain?
can they undertain? 	can I be undertaining?
can you be undertaining?
can he be undertaining?
can we be undertaining?
can you be undertaining?
can they be undertaining? 	can I have undertained?
can you have undertained?
can he have undertained?
can we have undertained?
can you have undertained?
can they have undertained? 	can I have been undertaining?
can you have been undertaining?
can he have been undertaining?
can we have been undertaining?
can you have been undertaining?
can they have been undertaining? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can't I undertain?
can't you undertain?
can't he undertain?
can't we undertain?
can't you undertain?
can't they undertain? 	can't I be undertaining?
can't you be undertaining?
can't he be undertaining?
can't we be undertaining?
can't you be undertaining?
can't they be undertaining? 	can't I have undertained?
can't you have undertained?
can't he have undertained?
can't we have undertained?
can't you have undertained?
can't they have undertained? 	can't I have been undertaining?
can't you have been undertaining?
can't he have been undertaining?
can't we have been undertaining?
can't you have been undertaining?
can't they have been undertaining?