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but it is a pro-form standing for "help".

Person and number

Languages typically have personal pronouns for each of the three grammatical persons:
*first-person pronouns normally refer to the speaker, in the case of the singular (as the English I), or to the speaker and others, in the case of the plural (as the English we).
*second-person pronouns normally refer to the person or persons being addressed (as the English you); in the plural they may also refer to

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