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Future perfect
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Future perfect continuous
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I'd be composing you'd be composing she'd be composing we'd be composing you'd be composing they'd be composing
Past
I'd have composed you'd have composed she'd have composed we'd have composed you'd have composed they'd have composed
Past continuous
I'd have been composing you'd have been composing she'd have been composing we'd have been composing you'd have been composing they'd have been composing