الخطا فين:' When hearing that the child had been found, she burst into tears. On hearing that the ch
 

الخطا فين:' When hearing that the child had been found, she burst into tears. On hearing that the ch

الحل هو on لانه يجب استخدام حرف الجر on وليس when اذا تزامن حدثان في الماضي او وقع احدهما مباشرة تلو الاخر وهو ما يوضحه سياق الجملة التي ذكرتها حضرتك

مشكور استاذي الكريم علي هذا النوع من الجمل لانه مميز جدا ويتطلب معرفه دقيقة باللغة.

اليك منى كل احترام وتقدير شكرا

On hearing that the child had been found, she burst into
tears.

To show that two things happen at the same time or that one thing happens
immediately after the other, use onlupon doing sth (NOT when):
'On examining the suitcase, he noticed that the locks had been tampered

with.'