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I'd been preascertaining you'd been preascertaining she'd been preascertaining we'd been preascertaining you'd been preascertaining they'd been preascertaining
I'll be preascertaining you'll be preascertaining she'll be preascertaining we'll be preascertaining you'll be preascertaining they'll be preascertaining
Futur antérieur
I'll have preascertained you'll have preascertained she'll have preascertained we'll have preascertained you'll have preascertained they'll have preascertained
Futur antérieur continu
I'll have been preascertaining you'll have been preascertaining she'll have been preascertaining we'll have been preascertaining you'll have been preascertaining they'll have been preascertaining
I'd be preascertaining you'd be preascertaining she'd be preascertaining we'd be preascertaining you'd be preascertaining they'd be preascertaining
Passé
I'd have preascertained you'd have preascertained she'd have preascertained we'd have preascertained you'd have preascertained they'd have preascertained
Passé continu
I'd have been preascertaining you'd have been preascertaining she'd have been preascertaining we'd have been preascertaining you'd have been preascertaining they'd have been preascertaining