hikkosigyousya ni reizouko wo hakonde morau tame ni, tuuro wo hiroku site oita.

Because this sentence uses ～てもらう, and with もらう, the person who does the action for you is marked with に.

• 引っ越し業者に = from the moving company / by the movers
• 運んでもらう = to have someone carry it for you / to get someone to carry it

So:

• 引っ越し業者に冷蔵庫を運んでもらう = have the movers carry the refrigerator for me

In other words, に marks the person you receive the favor/action from.

運んでもらう is:

• 運ぶ = to carry / transport
• ～て form: 運んで
• もらう = to receive

So literally, it is to receive the carrying from someone. In natural English, that usually becomes:

• to have someone carry it
• to get someone to carry it for you
• to have it moved by someone

This pattern often implies that the action is done for the speaker’s benefit.

So here, 冷蔵庫を運んでもらう means:

• to have the refrigerator carried (for me/us)

Because もらう attaches to the て-form of the verb.

The pattern is:

• Verb て-form + もらう

Examples:

• 教えてもらう = have someone teach you
• 手伝ってもらう = have someone help you
• 運んでもらう = have someone carry it for you

So 運ぶ has to become 運んで before もらう.

Here, ために means for the purpose of, in order to, or so that.

So:

• 引っ越し業者に冷蔵庫を運んでもらうために = in order to have the movers carry the refrigerator = so that the movers could carry the refrigerator

It shows the purpose of the action in the second part:

• 通路を広くしておいた = I made the passageway wide beforehand

So the whole idea is:

• I widened/cleared the passageway in advance so that the movers could carry the refrigerator.

を is correct because 通路 is the thing being made wide.

The expression is:

• 通路を広くする = to make the passageway wide

Here, 広い is an i-adjective, and 広くする means to make it wide.

So:

• 通路が広い = the passageway is wide
• 通路を広くする = to make the passageway wide

That is why 通路 takes を, not が.

It has two parts:

1. 広くする

   • 広い = wide
   • 広く = adverbial form of 広い
   • する = to make/do

   So 広くする means to make wide.

2. ～ておく

   • しておく means to do something in advance or to leave something done/prepared

So:

• 広くしておいた = made it wide beforehand
• more naturally: cleared/widened the passageway in advance

This often implies preparation for something later.

～ておく adds the idea of preparation in advance.

So this is not just:

• 通路を広くした = I made the passageway wide

It is:

• 通路を広くしておいた = I made the passageway wide ahead of time, in preparation

That fits perfectly with the purpose phrase:

• 引っ越し業者に冷蔵庫を運んでもらうために = in order to have the movers carry the refrigerator

So the sentence implies:

• I prepared the space beforehand so the movers would be able to move the refrigerator.

Because they belong to different verbs/actions.

1. 冷蔵庫を運んでもらう

   • 冷蔵庫を goes with 運ぶ
   • the refrigerator is the thing being carried

2. 通路を広くしておいた

   • 通路を goes with 広くする
   • the passageway is the thing being made wide

Japanese allows this because each を is tied to its own predicate.

So there is no problem with having two を particles in one sentence when they belong to different parts of the sentence.

Japanese nouns usually do not show singular/plural clearly unless the context makes it necessary.

So 引っ越し業者 could mean:

• the moving company
• the movers
• a moving company

In natural English, this sentence is often translated with a plural idea:

• the movers

But grammatically, Japanese itself does not force singular or plural here.

Yes, the subject is omitted, which is very common in Japanese.

From context, the person who did しておいた is probably:

• I
• or we

So the sentence naturally means something like:

• I had the passageway widened/cleared in advance
• We made the passageway wider in advance

Japanese often leaves out subjects when they are obvious from context.

Yes. Literally, it means made the passageway wide, but in natural English that often becomes:

• I cleared the passageway
• I made more space in the hallway
• I widened the path

The Japanese focuses on the resulting condition: the passageway became wide/open enough.

So even though the literal wording is made wide, the practical meaning is often cleared space for moving the refrigerator.

Because ～てもらう and ～させる express very different ideas.

• 運んでもらう = have someone carry it for you / receive that favor
• 運ばせる = make/let someone carry it

Here, the movers are professionals doing a service for the speaker, so ～てもらう is much more natural. It presents the action as something the speaker is having done for their benefit, not forcing someone to do it.

So:

• 引っ越し業者に冷蔵庫を運んでもらう sounds natural for using a moving company’s service

No, not in this sentence.

Here ために clearly means for the purpose of or in order to.

• 引っ越し業者に冷蔵庫を運んでもらうために = in order to have the movers carry the refrigerator

Sometimes ために can mean because of, but that depends on context. Here it is a purpose expression, because the second action is a preparation for the first.

So this is a purpose sentence, not a cause sentence.

It breaks down like this:

• 引っ越し業者に = by/from the movers

• 冷蔵庫を = the refrigerator

• 運んでもらう = have carried for me

• ために = in order to

• 通路を = the passageway

• 広くしておいた = made wide in advance

So the structure is:

[purpose] + [main action done in preparation]

More literally:

• In order to have the movers carry the refrigerator, I made the passageway wide beforehand.

More natural English:

• I cleared the passageway in advance so the movers could carry the refrigerator.