English has many irregular verbs that don’t follow the regular -ed ending rule, and one that often confuses learners is the verb mistake. Since this verb means “to misunderstand,” “to misidentify,” or “to be wrong about something,” it is used in many contexts. But what is the correct past tense of mistake? Is it mistook or mistaken? Let’s break it down with simple explanations and examples.
Past Tense of Mistake
The correct past tense of mistake is mistook.
- Base form: mistake
- Past tense: mistook
- Past participle: mistaken
Example:
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“She mistook him for his twin brother.”
Important: mistaken is not the simple past tense. It is the past participle, used with helping verbs like have or has.
Mistake: Verb Forms
Here’s the full conjugation of the verb mistake:
- Base form (present): mistake
- Past tense: mistook
- Past participle: mistaken
- Present participle/continuous: mistaking
Examples:
- “I often mistake people’s intentions.” (present)
- “He mistook my silence for agreement.” (past)
- “They have mistaken the directions again.” (past participle)
- “She is mistaking his kindness for weakness.” (continuous)
Common Mistakes with the Past Tense of Mistake
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❌ Using “mistaken” as past tense
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Incorrect: “I mistaken the time.”
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Correct: “I mistook the time.”
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❌ Adding -ed to form “mistaked”
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Incorrect: “He mistaked her for someone else.”
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Correct: “He mistook her for someone else.”
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❌ Mixing past tense and past participle
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Incorrect: “I have mistook the address.”
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Correct: “I have mistaken the address.”
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Examples of Mistake in Sentences
- Present tense: “I sometimes mistake her tone as being rude.”
- Past tense: “The driver mistook the exit and went the wrong way.”
- Past participle: “He has mistaken my words for criticism.”
- Continuous: “She is mistaking his shyness for arrogance.”
Mistook vs. Mistaken: Key Difference
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Mistook → The simple past tense of mistake.
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Example: “I mistook his laugh for sarcasm.”
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Mistaken → The past participle of mistake, used with have/has/had.
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Example: “You have mistaken me for someone else.”
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Quick tip: Think of the verb take → took → taken. The verb mistake follows the same pattern: mistake → mistook → mistaken.
Conclusion:
The correct past tense of mistake is mistook, while mistaken is its past participle form. Learners often confuse the two, but remembering the pattern take → took → taken can help. To use English accurately, always say mistook for the past tense and mistaken with have/has/had.