kagu wo ugokasite, heya wo hiroku simasu.

Because the sentence has two different verbs doing two different jobs:

• 家具を動かして = move the furniture
• 部屋を広くします = make the room spacious / make the room bigger-feeling

So:

• the first を marks 家具 as the thing being moved
• the second を marks 部屋 as the thing being changed

This is very common in Japanese. A sentence can contain more than one を if each one belongs to a different verb or verb phrase.

動かして is the て-form of 動かす, which means to move something.

So:

• 動かす → dictionary form
• 動かして → て-form

In this sentence, the て-form connects two actions:

• 家具を動かして、
• 部屋を広くします。

This often means:

• move the furniture, and then make the room feel more spacious
• or by moving the furniture, make the room more spacious

So the first action leads into the second.

Because when an い-adjective comes before する to mean make something ..., it changes from -い to -く.

So:

• 広い = spacious / wide
• 広くする = to make spacious / to make wider

This pattern is very important:

• 大きい → 大きくする = make bigger
• 新しい → 新しくする = make new / renew
• 早い → 早くする = make earlier / make faster

So 部屋を広くします literally means make the room spacious.

Usually, no. It normally means make the room feel more spacious or create more space in the room.

In this sentence, since the method is moving furniture, the idea is not that the room’s walls expand. It means something like:

• rearrange things so the room feels bigger
• open up more usable space
• make the room less cramped

So the meaning is often more natural in English as:

• I’ll move the furniture to make the room more spacious.
• By moving the furniture, I’ll create more space in the room.

It does mean to do, but it also has some extended uses. One important one is:

• noun/adjective + する can mean make it become ...

Here:

• 広くする = make [something] spacious / wider

So する is not just a simple do here. It helps express causing a change.

Compare:

• 部屋が広い = the room is spacious
• 部屋を広くする = make the room spacious

Because 部屋 is the thing being changed, not the thing being described.

Compare these:

• 部屋が広い = The room is spacious.

  • が marks the subject of the description.

• 部屋を広くする = Make the room spacious.

  • を marks the thing affected by the action.

So in 部屋を広くします, the speaker is actively changing the room’s condition.

Yes, most likely. Japanese often leaves out the subject when it is clear from context.

So this sentence could mean:

• I will move the furniture and make the room more spacious.
• We will move the furniture and make the room more spacious.
• Let’s move the furniture and make the room more spacious.
  depending on context

Japanese frequently omits words like I, we, and you if they are understood already.

It mainly shows a pause and helps readability. The grammar is already handled by the て-form.

So:

• 家具を動かして部屋を広くします
• 家具を動かして、部屋を広くします

Both are grammatically fine.

The comma just makes the sentence easier to read and slightly clearer.

Yes, in this context that is very natural.

Since the object is furniture, English would often say:

• move the furniture
• rearrange the furniture
• shift the furniture around

All of those fit the Japanese well, depending on context. The Japanese itself simply says move the furniture, but the real-life meaning is often closer to rearrange it.

• 広い is the normal adjective form: spacious / wide
• 広く is the adverbial / connecting form of the adjective

Examples:

• 部屋は広いです。 = The room is spacious.
• 部屋を広くします。 = Make the room spacious.
• 広く見える。 = It looks spacious.

For い-adjectives, changing -い to -く often lets the adjective connect to verbs or function adverbially.

It can feel like both, but most naturally it expresses one action done for a purpose.

Literally, it is:

• move the furniture, and make the room spacious

But in natural English, the relationship is usually:

• Move the furniture to make the room more spacious.

So the first action is the method, and the second is the result or goal.

Sometimes, but it would not mean exactly the same thing.

• 広くする = make something wide/spacious
• 広げる = spread out / widen / expand

For a room, 部屋を広くする is more natural when you mean make the room feel more spacious by arrangement.

広げる sounds more like physically widening or expanding something. In some contexts it can work, but with furniture arrangement, 広くする is the more natural choice.

It can be either, depending on context.

Japanese nouns usually do not change form for singular or plural. So 家具 could mean:

• a piece of furniture
• furniture in general
• the furniture

In this sentence, it most naturally means the furniture or some furniture in the room. English has to choose singular or plural-style wording, but Japanese does not need to.