A2 Elementary Past tenses
Past simple vs past continuous
Lesson goal. After this lesson you can tell a story with a background action and an interrupting one, using when and while correctly.
When to use it
- One action in progress when another happens: I was walking when I saw him.
- Two parallel long actions: While I was cooking, she was studying.
- Two actions one after the other: I opened the door and went in.
Form
| Pattern | Structure | Example |
|---|---|---|
| A long action is interrupted | was/were V-ing + when + past simple | I was sleeping when the alarm rang. |
| Same idea, clauses swapped | While + was/were V-ing, + past simple | While I was sleeping, the alarm rang. |
| Two actions at the same time | While + continuous, + continuous | While he was reading, I was cooking. |
| Two actions one after another | past simple + when + past simple | When I arrived, she left. |
Step by step
- Ask: which action is long, the background? That one takes the past continuous.
- Which one is short and interrupts? That takes the past simple.
- while usually goes before the long action; when before the short one.
- If both are short and sequential, both take the past simple.
when and while
| Linker | Used with | Example |
|---|---|---|
| while | a long action in progress | While she was driving… |
| when | a short action, happening once | … when the phone rang. |
| when (different meaning) | two actions one after the other | When I saw him, I said hello. |
Examples
I was having lunch when my phone rang.
While we were waiting, it started to rain.
She broke her leg while she was playing football.
When the teacher came in, we were talking loudly.
While my father was reading, my mother was cooking.
When I got home, I made dinner.
Common mistakes
While she cooked, the phone rang. → While she was cooking, the phone rang.
After while you almost always use the past continuous, because while stresses duration.
I was seeing an accident yesterday. → I saw an accident yesterday.
Seeing happens instantly, not over time → past simple. Verbs like see, hear, know rarely take the continuous.
When I was arriving, she was leaving the room. → When I arrived, she was leaving the room.
when takes the short action (arrived); only the ongoing one uses the continuous.
Memory tip
Picture a timeline: the long action is a line, the short one is a dot landing on it. Line → continuous. Dot → past simple.
Summary
- Long background → was/were V-ing; short interrupting action → past simple.
- while + long action · when + short action.
- Two parallel long actions → both continuous; two sequential events → both past simple.
Practise this lesson
Do exercises with an explanation for every question, take mini tests and track your progress on GrammUp.