他总是恭敬地与长辈说话。

He always spoke to his elders ___respectfully.

我必须恳请您重新考虑您的决定。

I must ___respectfully request that you reconsider your decision.

虽然我理解您的观点，但我必须礼貌地表示不同意。

While I understand your point, I must ___respectfully disagree.