Usage Examples Past Simple vs. Past Continuous

• While I was walking to the university, I witnessed an accident. -
• Were they studying at this time yesterday? -
• I wanted to call my mum but I called you instead. -
• What were they doing when you arrived at the party? -
• Were you sleeping when everything happened? -
• I went to Tokyo last month. -
• Why was Lucy smoking at the party? -
• I was standing in the line when I saw Mary. -
• My granddad went to see a doctor on Friday. -
• Were they smiling when they saw you? -
• Lisa was studying when Joe called her. -
• What were you doing at eight o'clock last night? -
• Paula was running when the storm started. -
• Anna was sleeping when the burglars broke into her house. -
• Which song were you singing when I came in? -
• My best friend graduated from the university in June. -
• The bird was singing in the garden when the cat attacked it. -
• Which shop did Tom go yesterday? -
• The town was changing quickly. -
• What was Jane wearing when you saw her at the theatre? -