Breakdown of Tā shuō kuàidì yǐjīng sòngdào lóuxià le, dànshì wǒ hái méi shōudào nàge bāoguǒ.
Questions & Answers about Tā shuō kuàidì yǐjīng sòngdào lóuxià le, dànshì wǒ hái méi shōudào nàge bāoguǒ.
They often work together naturally in Mandarin.
- 已经 means already
- 了 here marks a new situation or change of state
So 已经...了 is a very common pattern for saying that something has already happened or has reached a completed state.
In this sentence, 快递已经送到楼下了 means the delivery/package has already reached downstairs, and that is now the current situation.
You can compare:
- 快递已经送到楼下了 = The package has already been delivered downstairs.
- 快递送到楼下了 = The package was delivered downstairs.
- 快递已经送到楼下 = understandable, but it sounds less complete in everyday speech.
So using both is very normal.
Because 没(有) is used to negate:
- past events
- completed actions
- something that has not happened yet
Receiving a package is a completed event, so Chinese uses 没收到.
- 我没收到那个包裹 = I didn’t receive / haven’t received that package.
- 我不收那个包裹 = I won’t accept that package / I don’t accept that package.
So 不 would sound wrong here if you mean it hasn’t arrived to me yet.