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Future perfect
I'll have occurred you'll have occurred she'll have occurred we'll have occurred you'll have occurred they'll have occurred
Future perfect continuous
I'll have been occurring you'll have been occurring she'll have been occurring we'll have been occurring you'll have been occurring they'll have been occurring
I'd be occurring you'd be occurring she'd be occurring we'd be occurring you'd be occurring they'd be occurring
Past
I'd have occurred you'd have occurred she'd have occurred we'd have occurred you'd have occurred they'd have occurred
Past continuous
I'd have been occurring you'd have been occurring she'd have been occurring we'd have been occurring you'd have been occurring they'd have been occurring