should bum
Verbo regular: bum - bummed- bummed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I should bum
you should bum
he should bum
we should bum
you should bum
they should bum 	I should be bumming
you should be bumming
he should be bumming
we should be bumming
you should be bumming
they should be bumming	I should have bummed
you should have bummed
he should have bummed
we should have bummed
you should have bummed
they should have bummed	I should have been bumming
you should have been bumming
he should have been bumming
we should have been bumming
you should have been bumming
they should have been bumming	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I should not bum
you should not bum
he should not bum
we should not bum
you should not bum
they should not bum 	I should not be bumming
you should not be bumming
he should not be bumming
we should not be bumming
you should not be bumming
they should not be bumming	I should not have bummed
you should not have bummed
he should not have bummed
we should not have bummed
you should not have bummed
they should not have bummed	I should not have been bumming
you should not have been bumming
he should not have been bumming
we should not have been bumming
you should not have been bumming
they should not have been bumming	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
should I bum?
should you bum?
should he bum?
should we bum?
should you bum?
should they bum? 	should I be bumming?
should you be bumming?
should he be bumming?
should we be bumming?
should you be bumming?
should they be bumming? 	should I have bummed?
should you have bummed?
should he have bummed?
should we have bummed?
should you have bummed?
should they have bummed? 	should I have been bumming?
should you have been bumming?
should he have been bumming?
should we have been bumming?
should you have been bumming?
should they have been bumming? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
should I not bum?
should you not bum?
should he not bum?
should we not bum?
should you not bum?
should they not bum? 	should I not be bumming?
should you not be bumming?
should he not be bumming?
should we not be bumming?
should you not be bumming?
should they not be bumming? 	should I not have bummed?
should you not have bummed?
should he not have bummed?
should we not have bummed?
should you not have bummed?
should they not have bummed? 	should I not have been bumming?
should you not have been bumming?
should he not have been bumming?
should we not have been bumming?
should you not have been bumming?
should they not have been bumming?