The verb "forego" is an irregular verb in English, often used to mean to precede in place or time or to go before something. It is commonly confused with "forgo," which means to do without or abstain from.

In the present simple tense, "forego" follows its base form for most subjects: "I forego," "you forego," "he/she/it foregoes," and so on. For example, "Tradition foregoes the establishment of modern customs."

In the past simple tense, "forego" changes to "forewent." This irregular form is used to talk about actions that occurred in the past. For instance, "He forewent the usual procedures to expedite the process."

The past participle of "forego" is "foregone." When forming perfect tenses, such as present perfect or past perfect, the past participle is combined with auxiliary verbs. An example sentence is "This decision has been foregone by earlier considerations."

Understanding the irregular conjugation of "forego" is important for accurately describing actions related to preceding events or conditions. The verb "forego" adds a layer of depth to discussions about historical sequences or prior occurrences.