If you feel that you can hasten with it and finish it before the Imam begins his prayer, you should do so. Otherwise, simply intend to cut it and you are out.

SHEIKH, MY QUESTION IS WHN 1 SUM1 IS PRAYING SUNNAH OF ZUHR SALAAH IF IQAMA IS PRONOUNCED OF FAZRD SALAAH,I HAVE TO END MY SUNNAH SALAAH SO DIRECTLY CAN I END IT OR I HAVE TO SIT IN TASHUD N SALAM N END MY SALAAH…

Prayer | March 25, 2014 4:50 am
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Whether we can combine and shorten Asr prayer with Jumma ( Friday ) prayer while travelling. ( Pray the 2 rakah of Jumma with the Imam followed by 2 Rakah of Asr by ourselves)
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Asr time starts when the shadow of an object is equal it’s size. If this is right then the actual time of Asr starts at 4.06 pm and Fajr at 5.20 am but in our locality Asr is delayed to 5.30pm and Fajr to 6.00am. In this case what are the ruling for the men who join the jamath and the women who pray at home?