What is the relationship between active and passive voice in the context of English grammar?

The provided text lists examples of active and passive voice constructions across different tenses. The general relationship is that the passive voice is formed by using a form of the verb 'to be' followed by the past participle of the main verb. The object of the active sentence becomes the subject of the passive sentence, and the subject of the active sentence becomes the agent (often introduced by 'by') in the passive sentence, or is omitted. Here's a breakdown based on the examples: 1. Present Simple: * Active: make/makes * Passive: am/is/are + made 2. Present Continuous: * Active: is/are making * Passive: am/is/are + being + made 3. Past Simple: * Active: made * Passive: was/were + made 4. Past Continuous: * Active: was/were making * Passive: was/were + being + made 5. Present Perfect: * Active: have/has made * Passive: have/has + been + made (This is inferred, as 'been' is not explicitly written but is the standard form for Present Perfect Passive). 6. Future Simple: * Active: will make * Passive: will be + made (This is inferred, as 'be' is not explicitly written but is the standard form for Future Simple Passive). 7. Modals: * Active: could make * Passive: could be + made (This is inferred, as 'be' is not explicitly written but is the standard form for Modal Passive).