Excuse Me in Mandarin

Excuse Me in Mandarin / Chinese Language
借过 (jiè ɡuò):excuse me (please let me pass on the road).
借 光。=jiè guāng. = Excuse me please (when someone is in your way). (casual)
让一让(ràng yi ràng): This is a polite way of asking someone to “allow (让 – ràng)” you to pass.
让一下(ràng yi xià): Similar to 让一让(ràng yi ràng).
过一下 (ɡuò yi xià): This is similar to 让一下, but the difference is that the subject is yourself rather than the person you are speaking to. You are asking if you can “pass (过 – ɡuò)”, rather than if they can “let (让 – ràng)” you pass. To be polite, it’s best that  this one is used together with “劳驾 (láo jià),” as in “劳驾, 过一下” (láo jià, ɡuò yi xià“).
打扰了(dǎ rǎo le): excuse me (to get someone's attention), sorry to be disturbing
You can add for more politely or formally:
劳驾 (láo jià): This is perhaps the most polite, and it’s also flexible. You can also use this word for other tasks.

对不起=duì bu qǐ=unworthy/to let down/I'm sorry/excuse me/pardon me/if you please/sorry? (please repeat)

請＝qǐng= to ask/to invite/please (do sth)/to treat (to a meal etc)/to request.