I'll be steepening you'll be steepening he'll be steepening we'll be steepening you'll be steepening they'll be steepening
Futur antérieur
I'll have steepened you'll have steepened he'll have steepened we'll have steepened you'll have steepened they'll have steepened
Futur antérieur continu
I'll have been steepening you'll have been steepening he'll have been steepening we'll have been steepening you'll have been steepening they'll have been steepening
I'd be steepening you'd be steepening he'd be steepening we'd be steepening you'd be steepening they'd be steepening
Passé
I'd have steepened you'd have steepened he'd have steepened we'd have steepened you'd have steepened they'd have steepened
Passé continu
I'd have been steepening you'd have been steepening he'd have been steepening we'd have been steepening you'd have been steepening they'd have been steepening