I'd be treading you'd be treading he'd be treading we'd be treading you'd be treading they'd be treading
Perfecto
I should've trod, trodden you should've trod, trodden he should've trod, trodden we should've trod, trodden you should've trod, trodden they should've trod, trodden
Perfecto con V-ing
I should've been treading you should've been treading he should've been treading we should've been treading you should've been treading they should've been treading
Negación
Forma simple
I shouldn't tread you shouldn't tread he shouldn't tread we shouldn't tread you shouldn't tread they shouldn't tread
Forma con V-ing
I shouldn't be treading you shouldn't be treading he shouldn't be treading we shouldn't be treading you shouldn't be treading they shouldn't be treading
Perfecto
I shouldn't have trod, trodden you shouldn't have trod, trodden he shouldn't have trod, trodden we shouldn't have trod, trodden you shouldn't have trod, trodden they shouldn't have trod, trodden
Perfecto con V-ing
I shouldn't have been treading you shouldn't have been treading he shouldn't have been treading we shouldn't have been treading you shouldn't have been treading they shouldn't have been treading
Forma interrogativa
Forma simple
should I tread? should you tread? should he tread? should we tread? should you tread? should they tread?
Forma con V-ing
should I be treading? should you be treading? should he be treading? should we be treading? should you be treading? should they be treading?
Perfecto
should I have trod, trodden? should you have trod, trodden? should he have trod, trodden? should we have trod, trodden? should you have trod, trodden? should they have trod, trodden?
Perfecto con V-ing
should I have been treading? should you have been treading? should he have been treading? should we have been treading? should you have been treading? should they have been treading?
Forma interro-negativa
Forma simple
shouldn't I tread? shouldn't you tread? shouldn't he tread? shouldn't we tread? shouldn't you tread? shouldn't they tread?
Forma con V-ing
shouldn't I be treading? shouldn't you be treading? shouldn't he be treading? shouldn't we be treading? shouldn't you be treading? shouldn't they be treading?
Perfecto
shouldn't I have trod, trodden? shouldn't you have trod, trodden? shouldn't he have trod, trodden? shouldn't we have trod, trodden? shouldn't you have trod, trodden? shouldn't they have trod, trodden?
Perfecto con V-ing
shouldn't I have been treading? shouldn't you have been treading? shouldn't he have been treading? shouldn't we have been treading? shouldn't you have been treading? shouldn't they have been treading?