Past Continuous Tense

The past continuous tense describes actions that were happening over a period of time in the past. At the advanced level, you will learn how to combine the past continuous with other actions using "while" and "when" to show interrupted and simultaneous actions.

What You'll Learn

How to use "while" clauses to show two actions happening at the same time
How to describe an action that was interrupted by another action
How to tell the difference between the longer action (past continuous) and the shorter action (simple past)
How to use the past continuous with "when" and "while" in the same sentence

When to Use

Two actions happening at the same time: "While Mei Ling was studying, her brother was playing the piano."
A longer action interrupted by a shorter one: "I was walking home when it suddenly started to rain."
Setting the scene before an event: "The children were playing at the void deck when they heard a loud bang."
Describing what was happening at a specific moment: "At 3 PM yesterday, we were waiting for the bus at the MRT station."
Telling a story with background details: "The wind was blowing hard and the waves were crashing against the rocks when the fisherman spotted the boat."

How to Form

"While" Clause (Two Actions at the Same Time)

Use "while" with the past continuous to show two long actions happening together.

Structure	Example
While + subject + was/were + verb-ing, subject + was/were + verb-ing	While Dad was washing the car, Mum was watering the plants.
Subject + was/were + verb-ing + while + subject + was/were + verb-ing	I was reading while my sister was drawing.

"When" Clause (Interrupted Action)

Use the past continuous for the longer action and the simple past for the action that interrupted it.

Structure	Example
Subject + was/were + verb-ing + when + subject + simple past	She was crossing the road when she saw her friend.
When + subject + simple past, subject + was/were + verb-ing	When the bell rang, we were eating our sandwiches.

"While" with an Interrupted Action

"While" can also be used when a long action is interrupted by a short one.

Structure	Example
While + subject + was/were + verb-ing, subject + simple past	While I was doing my homework, the lights went off.
Subject + simple past + while + subject + was/were + verb-ing	The cat jumped onto the table while we were having dinner.

Key Rules

"While" signals the longer action: The action after "while" is usually in the past continuous because it is the longer, ongoing action. "While she was sleeping, the alarm went off."
"When" signals the shorter action: The action after "when" is usually in the simple past because it is the shorter, interrupting action. "I was reading when the doorbell rang."
Both actions can be past continuous: When two actions were happening at the same time and neither interrupted the other, both use past continuous. "While I was cooking, he was setting the table."
Use "was" with I/he/she/it: "She was running when she tripped." Do not write "She were running."
Use "were" with you/we/they: "They were chatting while waiting for the bus." Do not write "They was chatting."
The interrupting action uses simple past, not past continuous: "I was eating when the phone rang." Do not write "when the phone was ringing" for a sudden interruption.

Common Mistakes

Wrong	Right	Why
While she slept, the alarm rang.	While she was sleeping, the alarm rang.	The action after "while" should be past continuous (the longer action).
I was reading when the phone was ringing.	I was reading when the phone rang.	The interrupting action is short and sudden, so use simple past.
While I was eating, while she was talking.	While I was eating, she was talking.	Use "while" only once. The second clause does not need "while" again.
He were playing football when it started raining.	He was playing football when it started raining.	Use "was" with he/she/it, not "were".
When I was walking to school, I was finding a $2 coin.	When I was walking to school, I found a $2 coin.	Finding the coin is a sudden, short action. Use simple past.
While the teacher was talking, we was listening.	While the teacher was talking, we were listening.	Use "were" with we/they/you, not "was".

Clue Words

Words that signal the longer action (past continuous):

while, as, all morning, all afternoon, the whole time, at that moment

Words that signal the interrupting action (simple past):

when, suddenly, just then, all of a sudden

Time expressions used with the past continuous:

at 5 PM yesterday, at that time, during recess, throughout the afternoon

Tip: Think of it like watching a video. The past continuous is the video playing in the background. The simple past is someone pressing the pause button. "While" describes what was playing. "When" or "suddenly" describes the moment someone pressed pause.

Practice Tips

Draw a timeline: Draw a long arrow for the ongoing action and a short mark cutting across it for the interrupting action. Label the long arrow "past continuous" and the short mark "simple past". This helps you see which tense to use.
The "while" test: If you can put "while" in front of the action, it is probably the longer one and needs the past continuous. "While I was eating..." works. "While I found..." does not sound right.
Spot the sudden action: Look for words like "suddenly", "just then", or "all of a sudden". The action right after these words is the short, interrupting action and should be in the simple past.
Check was/were agreement: After choosing the correct tense, double-check: I/he/she/it takes "was"; you/we/they takes "were".

Quick Reference

Pattern	Structure	Example
Two actions at the same time	While + past continuous, past continuous	While I was cooking, she was reading.
Interrupted action (when)	Past continuous + when + simple past	I was sleeping when the alarm rang.
Interrupted action (while)	While + past continuous, simple past	While he was jogging, it started to rain.
Sudden interruption	Past continuous + suddenly + simple past	We were watching TV when suddenly the lights went out.
Background scene in a story	Past continuous, past continuous + when + simple past	Birds were singing and the sun was shining when we arrived.
was vs were	was: I, he, she, it / were: you, we, they	She was reading. They were playing.

Past Continuous Tense (P4) (Primary 4)