should backfill
Verbo regular: backfill - backfilled- backfilled

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I should backfill
you should backfill
she should backfill
we should backfill
you should backfill
they should backfill 	I should be backfilling
you should be backfilling
she should be backfilling
we should be backfilling
you should be backfilling
they should be backfilling	I should have backfilled
you should have backfilled
she should have backfilled
we should have backfilled
you should have backfilled
they should have backfilled	I should have been backfilling
you should have been backfilling
she should have been backfilling
we should have been backfilling
you should have been backfilling
they should have been backfilling	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I should not backfill
you should not backfill
she should not backfill
we should not backfill
you should not backfill
they should not backfill 	I should not be backfilling
you should not be backfilling
she should not be backfilling
we should not be backfilling
you should not be backfilling
they should not be backfilling	I should not have backfilled
you should not have backfilled
she should not have backfilled
we should not have backfilled
you should not have backfilled
they should not have backfilled	I should not have been backfilling
you should not have been backfilling
she should not have been backfilling
we should not have been backfilling
you should not have been backfilling
they should not have been backfilling	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
should I backfill?
should you backfill?
should she backfill?
should we backfill?
should you backfill?
should they backfill? 	should I be backfilling?
should you be backfilling?
should she be backfilling?
should we be backfilling?
should you be backfilling?
should they be backfilling? 	should I have backfilled?
should you have backfilled?
should she have backfilled?
should we have backfilled?
should you have backfilled?
should they have backfilled? 	should I have been backfilling?
should you have been backfilling?
should she have been backfilling?
should we have been backfilling?
should you have been backfilling?
should they have been backfilling? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
should I not backfill?
should you not backfill?
should she not backfill?
should we not backfill?
should you not backfill?
should they not backfill? 	should I not be backfilling?
should you not be backfilling?
should she not be backfilling?
should we not be backfilling?
should you not be backfilling?
should they not be backfilling? 	should I not have backfilled?
should you not have backfilled?
should she not have backfilled?
should we not have backfilled?
should you not have backfilled?
should they not have backfilled? 	should I not have been backfilling?
should you not have been backfilling?
should she not have been backfilling?
should we not have been backfilling?
should you not have been backfilling?
should they not have been backfilling?