I'll be preventing you'll be preventing she'll be preventing we'll be preventing you'll be preventing they'll be preventing
Futuro perfecto
I'll have prevented you'll have prevented she'll have prevented we'll have prevented you'll have prevented they'll have prevented
Futuro perfecto contínuo
I'll have been preventing you'll have been preventing she'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 she'd be preventing we'd be preventing you'd be preventing they'd be preventing
Passado
I'd have prevented you'd have prevented she'd have prevented we'd have prevented you'd have prevented they'd have prevented
Passado continuo
I'd have been preventing you'd have been preventing she'd have been preventing we'd have been preventing you'd have been preventing they'd have been preventing