THE IDIOM COLLECTION LEARN & PRACTISE
Lose your train of thought
Understand the meaning. See it in context. Make it yours.
01 / UNDERSTAND
Meaning in plain English
Forget the connected ideas you were thinking about or intended to say.
02 / SEE IT IN CONTEXT
The expression in a sentence
- The doorbell rang, and I lost my train of thought halfway through the explanation.
03 / CHECK YOUR UNDERSTANDING
Quick idiom quiz
Try the question without looking back, then write a sentence of your own. You can retry as often as you like.
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Can you recall the expression?
Which expression from this lesson matches this meaning?
Forget the connected ideas you were thinking about or intended to say.
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Lose your train of thought — Forget the connected ideas you were thinking about or intended to say.
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Make it yours
Write one sentence using “Lose your train of thought” about your own life.
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Does your sentence match this meaning?
Forget the connected ideas you were thinking about or intended to say.
Compare: The doorbell rang, and I lost my train of thought halfway through the explanation.
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More ways to understand and use it
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When to use it
Use this everyday expression when an interruption or distraction makes you lose track of your point. It is useful when asking for a moment to collect your thoughts.
More examples in context
- Sorry, I’ve lost my train of thought. What was I saying?
- I write down a few key words so I don’t lose my train of thought during a presentation.
Usage note
Use singular “train” and uncountable “thought” in this fixed phrase. The possessive changes with the speaker: “my train of thought” or “her train of thought”. It describes a break in connected thinking.
A short conversation
A: You were about to explain the second option.
B: Thanks. I lost my train of thought when the phone rang.
A: Take your time. We’re listening.
One more practice question
What happens when a speaker loses their train of thought?
A. They forget the point they were developing.
B. They remember every point without interruption.
Check your answer
A. The connected sequence of ideas has been interrupted or forgotten.
Related lessons
Meaning and usage checked against Oxford Learner’s Dictionaries. Explanations, examples and conversation are original.