So even if you don't use these exact sentences, if you use, "May I ...", "Would you ...," "Would you mind ...", these are going to make your sentences more polite.
所以,即使你不用這些準確的句子,如果你用,"我可以......","你可以......嗎","你可以......嗎","你可以介意......嗎",這些都會使你的句子更加禮貌。