I'll be speculating you'll be speculating she'll be speculating we'll be speculating you'll be speculating they'll be speculating
Future perfect
I'll have speculated you'll have speculated she'll have speculated we'll have speculated you'll have speculated they'll have speculated
Future perfect continuous
I'll have been speculating you'll have been speculating she'll have been speculating we'll have been speculating you'll have been speculating they'll have been speculating
I'd be speculating you'd be speculating she'd be speculating we'd be speculating you'd be speculating they'd be speculating
Past
I'd have speculated you'd have speculated she'd have speculated we'd have speculated you'd have speculated they'd have speculated
Past continuous
I'd have been speculating you'd have been speculating she'd have been speculating we'd have been speculating you'd have been speculating they'd have been speculating