I'll be preventing you'll be preventing he'll be preventing we'll be preventing you'll be preventing they'll be preventing
futuro perfeito
I'll have prevented you'll have prevented he'll have prevented we'll have prevented you'll have prevented they'll have prevented
futuro perfeito contínuo
I'll have been preventing you'll have been preventing he'll have been preventing we'll have been preventing you'll have been preventing they'll have been preventing
I'd be preventing you'd be preventing he'd be preventing we'd be preventing you'd be preventing they'd be preventing
Passado
I'd have prevented you'd have prevented he'd have prevented we'd have prevented you'd have prevented they'd have prevented
Passado contínuo
I'd have been preventing you'd have been preventing he'd have been preventing we'd have been preventing you'd have been preventing they'd have been preventing