What is the past tense of undergo?
The past tense of undergo is under-went, and the past participle is under-gone.
Undergo is an irregular (strong) verb: the vowel changes instead of adding -ed.
All forms of undergo
as a verb
- base
- undergo
- past tense
- under-went
- past participle
- under-gone
- present participle
- under-going
- third-person singular
- under-goes