should undertain
Verbo regular: undertain - undertained- undertained

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

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I should not undertain
you should not undertain
she should not undertain
we should not undertain
you should not undertain
they should not undertain 	I should not be undertaining
you should not be undertaining
she should not be undertaining
we should not be undertaining
you should not be undertaining
they should not be undertaining	I should not have undertained
you should not have undertained
she should not have undertained
we should not have undertained
you should not have undertained
they should not have undertained	I should not have been undertaining
you should not have been undertaining
she should not have been undertaining
we should not have been undertaining
you should not have been undertaining
they should not have been undertaining	

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

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
should I not undertain?
should you not undertain?
should she not undertain?
should we not undertain?
should you not undertain?
should they not undertain? 	should I not be undertaining?
should you not be undertaining?
should she not be undertaining?
should we not be undertaining?
should you not be undertaining?
should they not be undertaining? 	should I not have undertained?
should you not have undertained?
should she not have undertained?
should we not have undertained?
should you not have undertained?
should they not have undertained? 	should I not have been undertaining?
should you not have been undertaining?
should she not have been undertaining?
should we not have been undertaining?
should you not have been undertaining?
should they not have been undertaining?