Irregular VerbsPast tense of “undertake”: undertook, undertaken
The verb “undertake” is irregular: its past simple is “undertook” and its past participle is “undertaken”.
Base form (V1)
undertake
/ˌʌndəˈteɪk/
Past simple (V2)
undertook
/ˌʌndəˈtʊk/
Past participle (V3)
undertaken
/ˌʌndəˈteɪkən/
Meaning
to start a big job
Example
They undertook a difficult project.
Pattern
ABC — all three forms are different
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