The verb "forbid" is an irregular verb in English, commonly used to prohibit or disallow something. Its conjugation deviates from the regular pattern for verbs.

In the present simple tense, "forbid" follows its base form for most subjects: "I forbid," "you forbid," "he/she/it forbids," and so on. For example, "The school forbids students from using mobile phones during class."

In the past simple tense, "forbid" changes to "forbade." This irregular form is used to talk about actions that prohibited something in the past. For instance, "The king forbade the practice of certain rituals."

The past participle of "forbid" is "forbidden." When forming perfect tenses, such as present perfect or past perfect, the past participle is combined with auxiliary verbs. An example sentence is "They have forbidden entry to the restricted area."

Understanding the irregular conjugation of "forbid" is important for accurately describing actions related to prohibition or disallowance. The verb "forbid" is also used in various contexts, emphasizing its significance in the English language.