hiruma ha ie ni inai node, nimotu ha takuhaibokkusu ni irete moraimasita.

昼間は sets daytime as the time frame or topic: as for the daytime / during the daytime.

Japanese often uses は with time expressions when the speaker is saying something generally true in that time frame.
So:

• 昼間は家にいない = During the day, I’m not at home
• This sounds more like a general situation than a single specific time.

Using に would be unnatural here because 昼間 is not being treated as a precise point in time.

昼間 means daytime or during the day.

It refers to the part of the day when it is light out, and it often contrasts with being home at night. In this sentence, it implies something like:

• I’m not at home during the day
• maybe because of work, errands, school, etc.

It is a natural everyday word.

With いる and いない, Japanese uses に to mark the place where someone exists or is located.

So:

• 家にいる = to be at home
• 家にいない = to not be at home

Why not the others?

• で marks the place where an action happens, like 家で食べる = eat at home
• を marks a direct object or a route, so it does not work with いる

Because いる is about existence/location, に is the correct particle.

Yes.

• いる = to be, to exist, to be present
• いない = not be, not exist, not be present

Here, 家にいない literally means not be at home.

This is a very common pattern:

• 教室にいる = be in the classroom
• 教室にいない = not be in the classroom

ので means because, but it often sounds a bit softer, more explanatory, and a little more polite than から.

So:

• 家にいないので = because I’m not at home

Compared with から:

• 家にいないから can sound more direct or casual
• 家にいないので sounds more like giving a reason or explanation

In a sentence about delivery arrangements, ので fits very naturally.

Japanese very often puts the reason before the main result.

So the structure is:

• [Because I’m not home during the day], [I had the package put in the parcel box].

This is one of the most common clause orders in Japanese. English can do this too, but Japanese uses this pattern extremely often.

Here, 荷物 is being made the topic of the second part of the sentence.

The underlying idea is something like:

• 荷物を宅配ボックスに入れてもらいました = I had someone put the package in the delivery box

But when 荷物 is topicalized, は replaces を:

• 荷物は宅配ボックスに入れてもらいました

So 荷物は means something like:

• As for the package...
• The package, I had it put in the delivery box

This is very normal in Japanese.

Because に marks the destination or place something is put into.

With 入れる (to put in), the thing being inserted is the object, and the container/destination is marked by に:

• 荷物を宅配ボックスに入れる = put the package into the parcel box

So in this sentence:

• 宅配ボックスに = into the parcel box

宅配ボックス is a parcel delivery box or parcel locker.

It is a secure box, often in an apartment building or near a residence, where delivery staff can leave packages if the recipient is not home.

So this word is very practical and common in modern Japanese, especially in cities and apartment living.

This is a very important grammar pattern:

• て-form + もらう

It means to receive the favor/benefit of someone doing something for you.

So:

• 入れる = to put in
• 入れてもらう = to have someone put it in for you / to get someone to put it in for you

In past polite form:

• 入れてもらいました = had someone put it in / got someone to put it in

So the speaker is not saying I put it in myself.
They are saying someone else did that for me.

The sentence does not say explicitly, because Japanese often leaves obvious subjects unstated.

In context, it is most likely:

• the delivery person
• the courier company
• someone handling the package

So the sentence naturally implies:

• Because I’m not home during the day, I had the delivery person put the package in the parcel box.

Japanese often omits this kind of information when it is easy to guess from context.

Usually it suggests that the speaker received that action as a favor/arrangement, often because they requested it or it was arranged for their benefit.

So 入れてもらいました often implies:

• I asked/arranged for it to be put in the parcel box
• or they put it in the parcel box for me

It is not just a neutral statement that the package ended up there.
It highlights the speaker as the one who benefited from the action.

Only the main action is in the past:

• 入れてもらいました = past

The earlier part:

• 昼間は家にいないので = because I’m not home during the day

is a general condition or reason, not necessarily a one-time past event.

So the sentence means:

• Because I’m generally not home during the day, I had the package put in the parcel box.

This mix is perfectly normal in Japanese.

Japanese very often leaves out subjects and possessives when they are understood from context.

So:

• 家 is understood as my home
• the person not home is understood as I
• the person benefiting from もらいました is also understood as I

A natural English translation needs to add these words, but Japanese usually does not need them if the meaning is clear.

Yes. It sounds reasonably polite because of:

• ので, which is softer and more explanatory than から
• もらいました, which is in polite past form

It is the kind of sentence you might use in everyday conversation, customer service situations, or when explaining a delivery arrangement.