Irregular VerbsPast tense of “understand”: understood, understood
The verb “understand” is irregular: its past simple is “understood” and its past participle is “understood”.
Base form (V1)
understand
/ˌʌndəˈstænd/
Past simple (V2)
understood
/ˌʌndəˈstʊd/
Past participle (V3)
understood
/ˌʌndəˈstʊd/
Meaning
to know what something means
Example
I understood the lesson completely.
Pattern
ABB — past simple and past participle are the same
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