should sum
Verbo regolare: sum - summed- summed

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I should sum
you should sum
he should sum
we should sum
you should sum
they should sum 	I should be summing
you should be summing
he should be summing
we should be summing
you should be summing
they should be summing	I should have summed
you should have summed
he should have summed
we should have summed
you should have summed
they should have summed	I should have been summing
you should have been summing
he should have been summing
we should have been summing
you should have been summing
they should have been summing	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I should not sum
you should not sum
he should not sum
we should not sum
you should not sum
they should not sum 	I should not be summing
you should not be summing
he should not be summing
we should not be summing
you should not be summing
they should not be summing	I should not have summed
you should not have summed
he should not have summed
we should not have summed
you should not have summed
they should not have summed	I should not have been summing
you should not have been summing
he should not have been summing
we should not have been summing
you should not have been summing
they should not have been summing	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
should I sum?
should you sum?
should he sum?
should we sum?
should you sum?
should they sum? 	should I be summing?
should you be summing?
should he be summing?
should we be summing?
should you be summing?
should they be summing? 	should I have summed?
should you have summed?
should he have summed?
should we have summed?
should you have summed?
should they have summed? 	should I have been summing?
should you have been summing?
should he have been summing?
should we have been summing?
should you have been summing?
should they have been summing? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
should I not sum?
should you not sum?
should he not sum?
should we not sum?
should you not sum?
should they not sum? 	should I not be summing?
should you not be summing?
should he not be summing?
should we not be summing?
should you not be summing?
should they not be summing? 	should I not have summed?
should you not have summed?
should he not have summed?
should we not have summed?
should you not have summed?
should they not have summed? 	should I not have been summing?
should you not have been summing?
should he not have been summing?
should we not have been summing?
should you not have been summing?
should they not have been summing?