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I'll be knock knocking you'll be knock knocking she'll be knock knocking we'll be knock knocking you'll be knock knocking they'll be knock knocking
Future perfect
I'll have knock knocked you'll have knock knocked she'll have knock knocked we'll have knock knocked you'll have knock knocked they'll have knock knocked
Future perfect continuous
I'll have been knock knocking you'll have been knock knocking she'll have been knock knocking we'll have been knock knocking you'll have been knock knocking they'll have been knock knocking
I'd be knock knocking you'd be knock knocking she'd be knock knocking we'd be knock knocking you'd be knock knocking they'd be knock knocking
Past
I'd have knock knocked you'd have knock knocked she'd have knock knocked we'd have knock knocked you'd have knock knocked they'd have knock knocked
Past continuous
I'd have been knock knocking you'd have been knock knocking she'd have been knock knocking we'd have been knock knocking you'd have been knock knocking they'd have been knock knocking