Many a time same words are used as Prepositions and sometimes as Adverbs as well.
ADVERB
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PREPOSITION
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Words used as Adverbs do not contain objects and are used to modify a Verb, Adjective or an Adverb.
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Word used as a Preposition involves a Noun or Pronoun as its object
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Please come “in”. (In – Adverb; no object)
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I have kept the shoes neatly “in” a cupboard. (In – Preposition; cupboard – object)
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I have met her “before”. (Before – Adverb; no object)
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She stood “before” me. (Before – Preposition; object – me)
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Let’s move “on”. (On – Adverb; no object)
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The dog is sitting “on” the table. (On – Preposition; object – the table)
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