When —– Whıle
*When (dığı zaman) anlamında, onu takip eden cümle her zaman simple past tensedir..
– When I rang bell( zili çalmak), my mother was washing up.
– They were playing football when He came.
*While (iken) anlamında , onu takip eden zaman past progressive tense dir.
– While I was listening to music, My brother was watching films.
-We were sleeping(uyumak) while she was drawing pictures.