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different between yourself and yourselves ?
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Singular / plural.

Mark, please serve yourself before the potatoes get cold.
Janice, Georgia, Alice, please serve yourselves before the potatoes get cold.
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thanks you so muchEmotion: smile
Yourself is used only for a single person whereas yourselves is used for many people i.e. the people who are with the person(including the person) whom the speaker is reffering