I can still hear the frantic scratching of pens against paper in that quiet exam hall last Tuesday, followed by that heavy, collective sigh when the invigilator announced the end of the session. I looked down at a stack of papers and saw it again: the same predictable slip-ups with the “was” and “were” forms. Most textbooks make a massive production out of explaining how to use the past continuous, burying you under layers of academic jargon about “interrupted actions” and “background states.” But after nineteen years of marking these exams, I know the truth: you don’t need a PhD in linguistics to pass; you just need to stop making the habitual errors that drain your score.
I am not here to give you a lecture on theoretical grammar. My promise to you is much more practical. I am going to show you exactly where the examiners are looking and how to avoid the specific traps that turn a high-achieving student into a mediocre one. We are going to strip away the fluff and focus on the precise mechanics that actually earn you marks. By the time we are finished, you won’t just know the rules; you’ll have the muscle memory to use them correctly every single time.
Table of Contents
Mastering Was and Were Usage Without the Common Errors

I’ve lost count of how many times I’ve seen a student write “They was walking” during a high-stakes writing task. It’s a heartbreak because it’s such a basic slip, but in an exam, it signals a lack of control. To master was and were usage, you have to stop treating them as interchangeable fillers. Remember the rule: I, he, she, it take “was”; you, we, they take “were.” It sounds elementary, but when you are rushing to finish a timed essay, these small slips become habits that bleed your marks dry.
Once you have the subject-verb agreement locked in, we need to look at the bigger picture: past continuous vs past simple. I often tell my students to think of the continuous aspect as the “background music” of your story. It sets the scene in storytelling—describing what was happening when a sudden, sharp event (the past simple) broke the flow. If you use the simple past for everything, your writing feels like a dry list of facts. If you use the continuous for everything, it feels aimless. You must learn to use them together to show interrupted actions in the past with precision.
Navigating the Past Continuous vs Past Simple Trap

This is where I see my students stumble most often. They understand the mechanics of the tense, but they fail the logic of the narrative. In my nineteen years of teaching, I’ve noticed a recurring pattern: students use the past simple for everything, creating a “staccato” effect that lacks flow. To get those high marks in a writing exam, you must master the distinction between past continuous vs past simple. Think of the continuous aspect as the background music playing in a film, while the past simple represents the sudden, sharp movements of the actors.
When you are setting the scene in storytelling, you need that continuous “stretch” of time. For example, “The sun was shining and the birds were singing” creates an atmosphere. If you instead write, “The sun shone and the birds sang,” the sentence feels flat and disconnected. The real magic—and the real danger—happens when you introduce interrupted actions in the past. You use the continuous tense for the ongoing background action and the simple tense for the event that breaks in. If you miss this distinction, you aren’t just making a grammar error; you are failing to signal to the examiner that you understand how English time actually works.
My "Red Pen" Checklist: 5 Ways to Stop Losing Marks on the Past Continuous
- Watch your spelling on the “-ing” suffix. I see it constantly in handwritten exams: students writing “runing” instead of “running” or “makeing” instead of “making.” If you drop that extra consonant or keep an unnecessary ‘e’, you aren’t just making a spelling error; you are failing to demonstrate control over the tense.
- Stop treating “always” as a static word. In an exam, if you use “always” with the past continuous (e.g., “He was always losing his keys”), you are describing a persistent, annoying habit from the past. If you just want to state a fact, use the past simple. Using the continuous form incorrectly here signals to the examiner that you don’t understand nuance.
- Mind the “State Verb” trap. This is a classic. You cannot say “I was wanting” or “I was knowing.” Even if the action felt continuous to you, verbs of cognition, emotion, and possession stay in the past simple. If I see “was wanting” on a paper, I immediately know the student is guessing rather than applying rules.
- Check your “While” vs. “When” logic. This is where the marks bleed out. Use “while” to introduce the long, continuous background action (the “interruption”) and “when” to introduce the short, sudden action (the “interrupter”). Getting these flipped is a hallmark of a student who hasn’t mastered the structure.
- Don’t over-use it for everything. A common mistake is trying to make every sentence sound “advanced” by using the continuous. If you are describing a sequence of completed events in a story, use the past simple. The past continuous is for the atmosphere and the background; use it sparingly and purposefully, or you’ll lose the narrative flow.
Final Thoughts Before Your Exam

Let’s recap what we’ve covered so we can ensure these errors don’t end up on my “frequent flyer” list. We’ve tackled the fundamental distinction between was and were, ensuring your subject-verb agreement is airtight. More importantly, we’ve navigated that treacherous gap between the Past Simple and the Past Continuous, learning how to use the latter to set the scene without tripping over the sudden actions that interrupt them. Remember, the examiners aren’t looking for poetic flair; they are looking for consistent, predictable accuracy. If you can master these specific mechanics, you stop bleeding marks on the easy stuff and start showing them that you actually control the language.
I know that sitting for an English exam can feel like standing on the edge of a cliff, especially when you feel like the rules are constantly shifting under your feet. But please, believe me when I say that mastery is a matter of habit, not magic. You don’t need to learn every obscure tense in the English language to succeed; you just need to stop making the same twenty mistakes that pull your scores down. Treat these rules like a musical score—once you learn the rhythm and the patterns, you can perform with confidence. You have done the hard work of studying; now, let’s turn that knowledge into the automatic precision you need to pass.
Frequently Asked Questions
If I’m describing a long action that was interrupted, do I always need to use "when" to introduce the Past Simple part?
No, not at all. While “when” is a common tool in your kit, relying on it exclusively is a habit that can make your writing feel repetitive and mechanical. You can use “while” to introduce the long action, or even better, use no conjunction at all by splitting the ideas into two sentences. For example: “I was studying. Suddenly, the lights went out.” Variety shows the examiner you have true control.
Can I use the past continuous to describe a habit in the past, or is that strictly for the "used to" structure?
That is a brilliant question, and it’s one I’ve seen students stumble over in writing papers for years. The short answer? Yes, you can, but be careful. While “used to” describes a state or a routine, we use the past continuous to describe a repeated, often annoying, background action—think: “He was always interrupting me.” If you use it for a simple habit, you risk sounding imprecise. Stick to “used to” for facts; use the continuous for atmosphere or irritation.
I often get confused by sentences with two simultaneous actions—should I use the past continuous for both, or does one have to be the past simple?
This is a classic stumbling block, and it’s exactly the kind of nuance that examiners look for. If two long actions are happening at the same time—think of two people chatting while others are dancing—use the past continuous for both. It creates that “background” atmosphere. However, if one action is a sudden interruption, that’s where you switch to the past simple. Don’t let these overlapping timelines trip you up; keep the long actions flowing.