Perfects are a type of verb form used in grammar to indicate completed actions. They often describe events that have relevance to the present moment. In English, the most common perfect forms are the present perfect, past perfect, and future perfect, each serving to connect actions across different time frames. The present perfect, for example, combines the auxiliary verb "have" with the past participle of a verb, as in "I have eaten." The past perfect uses "had" to show an action completed before another past action, like "I had eaten before the meeting." The future perfect indicates an action that will be completed before a specified time in the future, such as "I will have eaten by noon."