This root form (lemma) is used in 2 different forms in the NT: προπορεύσονται (IFM3··P), προπορεύσῃ (IFM2··S).
It is glossed in 2 different ways: ‘will_be going_before’, ‘you will_be going_before’.
OET LUKE 1:76 Greek word=προπορεύσῃ (proporeusaʸ) Morphology=IFM2··S English gloss=‘you will_be going_before’ SR GNT LUKE 1:76 word 8
OET ACTS 7:40 Greek word=προπορεύσονται (proporeusontai) Morphology=IFM3··P English gloss=‘will_be going_before’ SR GNT ACTS 7:40 word 9