Mastering Past Tenses: When to Use 'Did' vs. 'Was/Were'

Learn to correctly choose between simple past and past continuous to describe completed actions and ongoing events in the past.

Explanation

In English, the simple past tense describes actions or events that are completed at a specific point in the past. In positive statements, it uses the auxiliary verb did together with the base form of the verb (e.g., She did call). For negatives and questions, did is also used and the main verb stays in its base form.

The past continuous tense (also called the past progressive) shows an action that was happening over a period of time in the past. It is formed with the past forms of 'be' – was or were – followed by the verb ending in -ing (e.g., They were watching a film). This tense is often used for longer background actions and for describing interruptions.

Examples

• She did finish her homework before dinner.
• He did not call me yesterday.
• Did you go to the meeting?
• They were playing football when it started raining.
• I was reading a book at 8 p.m.
• While she was cooking, the phone rang.

Common Mistakes

• Using both auxiliaries together: *She did was reading.* The correct form is either "She was reading" or "She did read."
• Forgetting the -ing ending: *He were working* → "He was working."
• Using stative verbs in the past continuous: *I was knowing the answer.* Use "I knew the answer."
• Mixing time markers: Using a definite time with a continuous form when the action was completed.

In Real Life

Anna: Hey, what did you do yesterday evening?

Ben: I was studying for my exam when the power went out.

Anna: Did you finish your revision?

Ben: No, I didn’t finish, but I did manage to read a few chapters.