She came - is the main clause as it is complete in itself. It has the subject and the predicate both.
When I was about to leave. - it is the subordinate clause as it cannot stand on its own and it not complete without the main clause.
?????? ???????????? ????? ????, ?? ???? ????? ????.??? ???????? 16 ??? ?????.?????? 1?? 12 ???.?????? ?????.????? ?????? ???????? ??? ???????? ?????????? ???????????? ??? ??? ????.?????? 5 ?????? ??? 5???? ??? .......8 ?????? ??? 8???? ??? ......???? ????