Actions in progress at a specific past time: was/were + verb-ing
Subject + was/were + verb-ing
Subject + was/were + not + verb-ing
Was/Were + subject + verb-ing?
💡 Use was with I/he/she/it; were with you/we/they.
✓I was studying at 10 pm.
✗I studied at 10 pm (if in progress).
Use continuous for action in progress at that time.
✓They were talking when I arrived.
✗They talked when I arrived.
Background action uses continuous; interrupting action uses simple.
✓What were you doing yesterday?
✗What was you doing yesterday?
Use were with you.