I'd be backfiring you'd be backfiring he'd be backfiring we'd be backfiring you'd be backfiring they'd be backfiring
Perfecto
I should've backfired you should've backfired he should've backfired we should've backfired you should've backfired they should've backfired
Perfecto con V-ing
I should've been backfiring you should've been backfiring he should've been backfiring we should've been backfiring you should've been backfiring they should've been backfiring
Negación
Forma simple
I shouldn't backfire you shouldn't backfire he shouldn't backfire we shouldn't backfire you shouldn't backfire they shouldn't backfire
Forma con V-ing
I shouldn't be backfiring you shouldn't be backfiring he shouldn't be backfiring we shouldn't be backfiring you shouldn't be backfiring they shouldn't be backfiring
Perfecto
I shouldn't have backfired you shouldn't have backfired he shouldn't have backfired we shouldn't have backfired you shouldn't have backfired they shouldn't have backfired
Perfecto con V-ing
I shouldn't have been backfiring you shouldn't have been backfiring he shouldn't have been backfiring we shouldn't have been backfiring you shouldn't have been backfiring they shouldn't have been backfiring
Forma interrogativa
Forma simple
should I backfire? should you backfire? should he backfire? should we backfire? should you backfire? should they backfire?
Forma con V-ing
should I be backfiring? should you be backfiring? should he be backfiring? should we be backfiring? should you be backfiring? should they be backfiring?
Perfecto
should I have backfired? should you have backfired? should he have backfired? should we have backfired? should you have backfired? should they have backfired?
Perfecto con V-ing
should I have been backfiring? should you have been backfiring? should he have been backfiring? should we have been backfiring? should you have been backfiring? should they have been backfiring?
Forma interro-negativa
Forma simple
shouldn't I backfire? shouldn't you backfire? shouldn't he backfire? shouldn't we backfire? shouldn't you backfire? shouldn't they backfire?
Forma con V-ing
shouldn't I be backfiring? shouldn't you be backfiring? shouldn't he be backfiring? shouldn't we be backfiring? shouldn't you be backfiring? shouldn't they be backfiring?
Perfecto
shouldn't I have backfired? shouldn't you have backfired? shouldn't he have backfired? shouldn't we have backfired? shouldn't you have backfired? shouldn't they have backfired?
Perfecto con V-ing
shouldn't I have been backfiring? shouldn't you have been backfiring? shouldn't he have been backfiring? shouldn't we have been backfiring? shouldn't you have been backfiring? shouldn't they have been backfiring?