Final Answer:
The verb that does not follow the SIDES pattern for irregular (affirmative and negative) formal commands is "B) Estar." Therefore the correct answer is option B.
Step-by-step explanation:
The SIDES pattern is a helpful mnemonic device to remember the irregular affirmative and negative formal commands in Spanish. The pattern stands for "Ser," "Ir," "Dar," "Estar," and "Saber." Each verb has its unique irregular form in both affirmative and negative formal commands. However, "Estar" does not follow this pattern.
In the affirmative formal command, "Estar" deviates from the expected form. Instead of following the SIDES pattern, it takes an irregular form: "Esté" for "usted" and "Estén" for "ustedes." For example, "Usted esté tranquilo" (You be calm) and "Ustedes estén tranquilos" (You all be calm).
Similarly, in the negative formal command, "Estar" again breaks away from the SIDES pattern. The correct forms are "No esté" for "usted" and "No estén" for "ustedes." For instance, "Usted no esté preocupado" (You don't be worried) and "Ustedes no estén preocupados" (You all don't be worried).
In summary, while "Ser," "Ir," "Dar," and "Saber" adhere to the SIDES pattern, "Estar" stands as an exception, requiring a unique conjugation for both affirmative and negative formal commands. This departure highlights the intricacies of irregular verb conjugations in Spanish formal commands. Therefore the correct answer is option B.