Usage Examples Past Simple vs. Past Continuous

• Which song were you singing when I came in? -
• My mother bought a new bag yesterday. -
• I met Elisa when I was going to work. -
• While I was walking to the university, I witnessed an accident. -
• I was standing in the line when I saw Mary. -
• Who did you see at the train station? -
• Were they studying at this time yesterday? -
• My wife arrived when I was having a bath. -
• Bob was waiting for me for two hours yesterday. -
• What was Jane wearing when you saw her at the theatre? -
• Was your grandmother working when she met your grandfather? -
• Why was Lucy smoking at the party? -
• Which shop did Tom go yesterday? -
• I was studying at the library all day yesterday. -
• I wanted to call my mum but I called you instead. -
• Paula was running when the storm started. -
• We found the keys we were looking for yesterday. -
• Maddie came back at midnight. -
• My best friend graduated from the university in June. -
• What were they doing when you arrived at the party? -