I'll be pondering you'll be pondering she'll be pondering we'll be pondering you'll be pondering they'll be pondering
Future perfect
I'll have pondered you'll have pondered she'll have pondered we'll have pondered you'll have pondered they'll have pondered
Future perfect continuous
I'll have been pondering you'll have been pondering she'll have been pondering we'll have been pondering you'll have been pondering they'll have been pondering
I'd be pondering you'd be pondering she'd be pondering we'd be pondering you'd be pondering they'd be pondering
Past
I'd have pondered you'd have pondered she'd have pondered we'd have pondered you'd have pondered they'd have pondered
Past continuous
I'd have been pondering you'd have been pondering she'd have been pondering we'd have been pondering you'd have been pondering they'd have been pondering