
Be a shadow/ghost of your former self
Emotional Impact
Often conveys sadness or sympathy for someone's decline in ability or health.

Since her illness, she's been a shadow of her former self, struggling to engage in the sports she loves.
Not Literal
Used figuratively to express a significant change, not to suggest someone is an actual shadow.

Jim used to be the life of the party, but now he's a shadow of his former self.
Change Over Time
Implies a decline from a previous state, often gradually or due to specific events.

The athlete was a shadow of his former self after his long break from training.
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