kuàidì yǐjīng sòngdào wǒ jiā le, wǒ xiànzài jiù qù qiānshōu.

They often work together, but they do different jobs.

• 已经 means already and clearly tells you the action happened earlier than expected or before now.
• The sentence-final 了 marks a new situation / change of state.

So in 快递已经送到我家了, the idea is:

• the delivery has already arrived
• and now the situation is that it has arrived

This 已经 ... 了 pattern is extremely common in Mandarin.

For example:

• 我已经吃了。 = I already ate / I’ve eaten already.
• 他已经走了。 = He has already left.

You can sometimes use just one of them, but using both is very natural here.

Here, 快递 refers to the delivery / package / courier delivery item.

Depending on context, 快递 can mean:

• express delivery service
• a package/parc el sent by courier
• sometimes even the courier person in casual speech

In this sentence, 快递已经送到我家了 most naturally means:

• The package has already been delivered to my home
• or The delivery has already arrived at my home

So 快递 here is basically the thing being delivered.

送到 is 送 + 到, where 到 is a result complement.

• 送 = to deliver / send
• 到 = to arrive / reach

Together, 送到 means to deliver to a place successfully, with focus on the result: it got there.

So:

• 送我家 would sound incomplete or unnatural here
• 送到我家 clearly means delivered to my home

This pattern is very common:

• 拿到 = get / obtain successfully
• 看到 = see successfully / catch sight of
• 找到 = find
• 搬到北京 = move to Beijing

In Chinese, when talking about your own home, family members, close relationships, or things closely associated with you, the 的 is often omitted.

So:

• 我家 = my home / my family / my place
• 我的家 is grammatical, but often sounds more explicit, heavier, or more emotional/literary depending on context

In everyday speech, 我家 is much more natural here.

Compare:

• 我妈妈 = my mom
• 我老师 can be used in some contexts, though 我的老师 is also common
• 我朋友 is possible in speech, but 我的朋友 is more standard in many situations

For home, 我家 is the normal choice.

The 了 at the end of 快递已经送到我家了 is not just a past-tense marker. Mandarin does not have tense in the same way English does.

Here, 了 shows that the situation has changed and now a new state is true:

• before: the package had not arrived
• now: the package has arrived

That is why it sounds natural with the second clause:

• 我现在就去签收 = I’ll go sign for it right now

So the 了 helps set up the current situation.

Here, 就 means something like:

• right away
• then
• as early as now
• without delay

So 我现在就去签收 means:

• I’ll go sign for it right now
• I’m going to sign for it immediately

It adds a sense of promptness.

Compare:

• 我现在去签收。 = I’m going now to sign for it.
• 我现在就去签收。 = I’m going right now, immediately.

So 就 makes the response feel quicker and more decisive.

签收 is a specific delivery-related verb. It means:

• to sign for and accept a delivery
• to acknowledge receipt by signing

This is more specific than just 收 (receive) because it usually involves officially accepting the package.

Common related words:

• 签 = to sign
• 收到 = to receive
• 签收快递 = sign for a package

So 去签收 means the speaker is going to complete the delivery process by accepting it.

In Chinese, time words usually come early in the sentence, often after the subject.

So the natural order is:

• 我 = subject
• 现在 = time
• 就 = adverb meaning right away
• 去签收 = go sign for it

So:

• 我现在就去签收 = natural

If you say 我就现在去签收, it sounds awkward in normal speech. Chinese usually prefers:

• 我现在就去
• 我马上就去
• 我这就去

Time expressions generally come before adverbs like 就.

The first clause does not explicitly say who delivered it.

• 快递已经送到我家了 literally is something like The package has already been delivered to my home / The delivery has already arrived at my home.

Chinese often leaves out the agent when it is obvious or unimportant. In this case, the speaker does not need to say:

• who delivered it
• whether it was the courier, delivery service, etc.

The important information is the result: it has arrived at my home.

If you wanted to mention the agent, you could say something like:

• 快递员已经把快递送到我家了。 = The courier has already delivered the package to my home.

Not necessarily.

送到我家 usually means delivered to my home / my place, but that can be understood flexibly depending on real-life context. It might mean:

• at the door
• at the gate
• downstairs
• at the front desk
• with security
• at the home address in general

So it does not always mean the package is literally inside the house already. It means it has reached the speaker’s home location.

Chinese often omits objects when they are obvious from context.

Here, the package has already been mentioned in the first clause:

• 快递已经送到我家了

So in the second clause, 签收 naturally means:

• sign for the package

You could say the full version:

• 我现在就去签收快递。

But leaving out 快递 is completely natural because everyone already knows what is being signed for.

Yes, 快递已经送到了我家 is also natural.

There is a small structural difference:

• 送到我家了: the 了 is sentence-final, emphasizing the new situation
• 送到了我家: the 了 is attached more directly to the verb phrase

In everyday speech, both are common and usually mean almost the same thing.

You may also hear:

• 快递已经送到我家了。
• 快递已经送到了我家。

Both are fine.

It is basically two connected clauses:

1. 快递已经送到我家了

   • 快递 = the package/delivery
   • 已经 = already
   • 送到我家 = has been delivered to my home
   • 了 = new situation/change of state

2. 我现在就去签收

   • 我 = I
   • 现在 = now
   • 就 = right away
   • 去签收 = go sign for it

So the logic is:

• The package has already arrived at my home, so I’ll go sign for it right now.

This kind of two-part sentence is very common in spoken and written Mandarin: first state the situation, then state the response.