Why? I'm going answer with "writer's choice of style". There is also an element of ellipsis here, with the understanding of an eliminated "while".
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Odessa DawnPhilip, I do not understand that construction I am going ...I can understand why it might seem strange to you. It's a use of the present continuous to indicate an action in the immediate future. A parent might say, "If you don't finish your vegetables right now, I'm going to send you to your room with no dessert."
PhilipA parent might say, "If you don't finish your vegetables right now, I'm going to send you to your room with no dessert."(to is an essential part)—I thought it is OK to be dropped.
Odessa DawnThanks.PhilipA parent might say, "If you don't finish your vegetables right now, I'm going to send you to your room with no dessert."(to is an essential part)—I thought it is OK to be dropped.It is, indeed, an essential part here.
GPYWithout a comma, I try to make "orchard grazing" into a phrase before realising this doesn't work and having to backtrack.That's the "better reasoning" I was hoping for. Thanks. GPY.