Past Simple vs. Past Continuous
When you tell a story about the past, you often need both tenses. The past simple (the past form of the verb: worked, went) says an action happened. The past continuous (was / were + -ing) says an action was in progress — not finished — at that moment.
LONG + SHORTA short action cuts in
The cooking goes on. The phone rings in the middle.
I was cooking dinner when the phone rang.
I started cooking first. The phone rang before I finished.
LONG + LONGAt the same time
Neither action cuts into the other.
While I was studying, my brother was playing games.
Both actions lasted for a while.
SHORT, SHORT, SHORTOne after another
Every verb is past simple.
She opened the door, turned on the light and sat down.
She did one thing, then the next, then the next.
The action in progress takes the past continuous; the action that cuts into it takes the past simple.
TRY IT
- Question 1
"Mai a book when her friend called."
- Question 2
"He his bag, locked the door and walked to the bus stop."
The four patterns
A sentence with when or while has two clauses. A clause is a part of a sentence with its own subject and verb. V2 is the past simple form of the verb (worked, went).
… WHEN + SHORT ACTION
Swas / were V-ingwhenSV2
We were waiting at the stop when the bus came.
The first clause is in progress; the clause after when cuts in.
WHILE + LONG ACTION, …
WhileSwas / were V-ing,SV2
While I was walking to work, I met an old friend.
While goes with the action in progress.
TWO LONG ACTIONS
WhileSwas / were V-ing,Swas / were V-ing
While the kids were sleeping, we were watching a film.
Both clauses are continuous, because both actions last.
A SEQUENCE
SV2,V2andV2
Minh came home, had a shower and went to bed.
The whole sequence is past simple.
The two clauses can swap places without changing the meaning: When the bus came, we were waiting at the stop. When the when or while clause comes first, use a comma. When it comes second, you usually don't.
At that moment, was the action still going on, or did it just happen? Still going on → was / were + -ing. Just happened → past simple.
TRY IT
- Question 1
"While my dad was cutting the grass, he a strange noise."
- Question 2
"While I was ironing, my sister her homework."
- Question 3
"We were having lunch when my uncle ."
When to use each
An action interrupted
Nam fell off his bike while he was riding to school.
The short action is often an accident, a call or a noise.
Signal words: when · while
Two things at once
Dad was reading the newspaper while Mum was making breakfast.
Two actions go on at the same time.
Signal words: while · at the same time
A sequence of events
I finished work, bought some bread and caught the bus home.
Told in order: what happened first comes first.
Signal words: and · then · after that
Starting a story
It was a cold night and the wind was blowing. Suddenly, all the lights went out.
The continuous describes the scene. The past simple tells what happened.
Signal words: It was raining · People were waiting · Suddenly
When vs. while
Both point to a time in the past. The difference is the kind of action that comes right after them.
| WHEN | WHILE | |
|---|---|---|
| Usually comes before | a short action (past simple) | a long action (was / were + -ing) |
| Example | I was washing up when Lan called. | While I was washing up, Lan called. |
| One thing, then the next | When the rain stopped, we went out. | not possible with while |
Keep the when clause the same and change the tense of the other clause, and the meaning changes. When we got to the cinema, our friends were waiting outside: they were already there, waiting. When we got to the cinema, we bought popcorn: we arrived, then we bought it.
TRY IT
- Question 1
" the film ended, everyone clapped."
- Question 2
Dad started before I came in. "When I got home, my dad my bike."
Common mistakes
Incorrect:I watched TV when my sister came home.
Correct:I was watching TV when my sister came home.
To say you were in the middle of watching when she arrived, use was watching. The wrong sentence means she came home and then you watched TV.
Incorrect:I walking home when I saw Minh.
Correct:I was walking home when I saw Minh.
An -ing form cannot be the verb on its own. The past continuous always needs was or were in front.
Incorrect:A man was stealing my bike while I shopped.
Correct:A man stole my bike while I was shopping.
The two actions are the wrong way round. The shopping is the long action, so it is continuous. Stealing the bike is the short action, so it is past simple.
Incorrect:Yesterday I was waking up at six, was having a shower and was leaving.
Correct:Yesterday I woke up at six, had a shower and left.
These actions follow one another and each one is finished, so the whole sequence is past simple.
Incorrect:While the bus arrived, I got on.
Correct:When the bus arrived, I got on.
A bus arriving is a moment. While does not go before an action like that.
Incorrect:I was reading when you come in.
Correct:I was reading when you came in.
Both halves of the sentence are about the past, so the verb after when is past simple too.
Quick check · 7 questions
Choose the correct form:
Ngọc was drying her hair when the doorbell rang, so she didn't hear it.
- A. was drying — Correct
- B. dried
- C. dries
Answer: A. was drying
She was in the middle of drying her hair when the bell rang, so she didn't hear it. "Dried" would mean the bell rang first and then she dried her hair. "Dries" is present.
Choose the correct form:
We were walking in the park when a big dog ran towards us.
- A. ran — Correct
- B. was running
- C. run
Answer: A. ran
The walk was in progress (were walking). The dog ran over in the middle of it. That is a short action, so it takes the past simple: run → ran.
Choose the correct form:
While Huy was washing the car, his kids were playing in the garden.
- A. was washing — Correct
- B. washes
- C. washing
Answer: A. was washing
Washing the car and playing in the garden went on at the same time. The second half has were playing, so the first needs was + -ing too. "Washing" alone has no was.
Choose the correct form:
Last Sunday we packed some food, got in the car and drove to the lake.
- A. packed — Correct
- B. were packing
- C. pack
Answer: A. packed
The three actions happened one after another, so packed is past simple, like got and drove.
Choose the correct word:
When the teacher came in, everyone stopped talking.
- A. When — Correct
- B. While
Answer: A. When
The teacher came in at one moment. While goes before an action that lasts, so this sentence needs when.
You arrived first, and then your friends opened the presents. Choose the correct form:
When I got to the party, my friends opened the presents.
- A. opened — Correct
- B. were opening
- C. was opening
Answer: A. opened
You arrived, and after that they opened the presents, so both halves are past simple. "Were opening" would mean they were in the middle of it when you walked in.
Choose the correct form:
I was sleeping when you called last night, so I didn't answer.
- A. called — Correct
- B. call
- C. was calling
Answer: A. called
The whole sentence is about last night, so the short action after when is past simple too. "Call" is present, and "was calling" does not go with you.
See whether it really stuck.
Start the quiz · 12 questions
