fall off

动词

To become detached or to drop from. (intransitive, transitive) · A button fell off my coat.
To diminish in size, value, etc.; to get worse (in quality). (intransitive) · Business always falls off in the winter.· MC ___'s new album is wack - he's fallen off big-time.
To change the direction of a sail so as to point in a direction that is more down wind; to bring the bow leeward.
To fall into sin; to stray. (intransitive)

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“You’ll fall off and be killed.

“There’s one thing plain to be seen, Anne,” said Marilla, “and that is that your fall off the Barry roof hasn’t injured your tongue at all.”

Is not that the place where an object upon the roof might be expected to fall off?

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