Past tense of undergo

The past simple tense (sometimes called preterite, simple past or past indefinite) is the basic form of the past tense. This is one of the most common past tenses and can describe a lot of events. It is really important to know how and when to use this tense for daily conversation.

But there are a lot of irregular past tense forms in English. Here are the most common irregular verbs in English, with their past tense forms. We have prepared some examples of past simple time.
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