undergo
Base form
undergo
/ˌʌndəˈɡəʊ//ˌʌndərˈɡəʊ/
Past simple
underwent
/ˌʌndəˈwent//ˌʌndərˈwent/
Past participle
undergone
/ˌʌndəˈɡɒn//ˌʌndərˈɡɔːn/
MeaningB2
to experience something, especially a change or something unpleasant
to undergo a sea change
In use
- After a modal verb · Form 1Patients must undergo a check-up before the operation.
- Question · Form 1Did the bridge undergo any repairs last year?
- Past simple · Form 2Last year my dad underwent heart surgery and is fine now.
- Past simple · Form 2In the 1990s the city underwent huge changes.
- Present perfect · Form 3The school has undergone a complete makeover this summer.
- Past perfect · Form 3By 2010 the team had undergone three changes of coach.
Watch out
Underwent and undergone keep went and gone from go: undergoed and undergoned are wrong.
Same pattern
A — B — CAll three forms differ
Irregular VerbsLearn all three forms for good
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