asa kara hanagoe datta si, kata ni sippu mo hatte ita node, kyou ha ie de yasumukoto ni simasita.

Here, 朝から means from the morning / since morning.

This から is the particle that marks a starting point in time or place, not the because meaning.

• 朝から = from the morning, since morning
• 9時から = from 9 o’clock
• 家から = from home

In this sentence, 朝から鼻声だった means the speaker had a nasal/stuffy voice starting in the morning.

Later in the sentence, ので gives the reason for the decision. So although English might use since or because in different ways, here:

• 朝から = time starting point
• ので = because / so

鼻声 literally means nose voice, and it refers to a nasal voice—the kind of voice you have when your nose is blocked, such as during a cold or allergies.

It does not usually mean simply a bad voice or a sore throat. It specifically suggests that the speaker sounded congested.

So 鼻声だった means something like:

• had a nasal voice
• sounded stuffed up
• sounded congested

Both are grammatically possible, but they have different levels of formality.

• 鼻声だった = plain past
• 鼻声でした = polite past

This sentence ends with しました, which is polite, but Japanese often mixes:

• plain forms in the middle of a sentence
• a polite form at the end

That is very common.

So this is normal:

• 鼻声だったし、…ので、…しました。

The sentence is overall polite because the final verb is polite.

し is often used to give a reason or to list one reason among others.

In this sentence, 鼻声だったし feels like:

• I had a nasal voice, and...
• I mean, I had a nasal voice, plus...
• Since I had a nasal voice, and also...

It suggests that this is not the only reason. The next clause adds another one:

• 鼻声だったし、肩に湿布も貼っていた = I had a nasal voice, and I was also wearing a patch on my shoulder

So し gives a sense of one reason among several, often with a conversational tone.

Yes, both connect to reasons, but they do different jobs here.

• し links reasons together
• ので connects those reasons to the result

Structure:

• 鼻声だったし、肩に湿布も貼っていたので、今日は家で休むことにしました。

You can think of it like:

• Since I had a nasal voice, and I was also wearing a patch on my shoulder, I decided to rest at home today.

So:

1. し = adds one reason to another
2. ので = because of that, therefore

This is very natural Japanese.

The も means also / too.

• 肩に湿布を貼っていた = I had a patch on my shoulder
• 肩に湿布も貼っていた = I also had a patch on my shoulder

The も helps show that this is another sign that the speaker was not feeling well.

So the sentence is building up evidence:

• I had a nasal voice,
• and I also had a patch on my shoulder,
• so I decided to rest at home.

Without も, the sentence would still be grammatical, but も makes the accumulation of reasons clearer.

With 貼る (to stick / attach), the place something is attached to is often marked by に.

So:

• 肩に湿布を貼る = stick a compress/patch on the shoulder

Here:

• 肩に = on the shoulder
• 湿布を = the patch/compress (direct object)

This is a common pattern:

• 壁にポスターを貼る = put a poster on the wall
• 箱にシールを貼る = stick a seal/sticker on the box

So に marks the target location where something gets attached.

貼っていた is the past form of 貼っている, and here it describes a resulting state that was in effect.

With verbs like 貼る (to stick), 〜ている often means the thing is currently attached, not necessarily that the person is in the middle of sticking it on.

So:

• 湿布を貼った = put on a patch
• 湿布を貼っていた = had a patch on / was wearing a patch

In this sentence, the speaker is not emphasizing the moment of putting it on. They are describing their condition at the time:

• they had a nasal voice
• they had a patch on their shoulder

So 貼っていた is very natural.

湿布 usually refers to a medicated compress, pain-relief patch, or poultice-like patch placed on the body, often for muscle pain or stiffness.

It is not exactly the same as a normal bandage.

Common image:

• a patch placed on the shoulder, back, knee, etc.
• often used for soreness or pain

So in this sentence, 肩に湿布も貼っていた suggests the speaker’s shoulder was bothering them enough that they had applied a pain-relief patch.

The は marks today as the topic, and it can also add a slight sense of contrast.

• 今日は家で休むことにしました = As for today, I decided to rest at home.

This can imply something like:

• today at least
• today, rather than going out / working / doing something else

Using は is very natural here because the speaker is talking about what they decided to do for today.

Because で marks the place where an action happens.

• 家で休む = rest at home

Here, 休む is an action, so the location of that action takes で.

Compare:

• 家に行く = go home
  (に marks destination)
• 家で休む = rest at home
  (で marks location of action)

So 家で is correct because the resting happens there.

This is the pattern dictionary form + ことにする / ことにしました, which means:

• decide to do
• make it a decision to do

So:

• 休む = to rest
• 休むことにする = decide to rest
• 休むことにしました = decided to rest

This pattern is very common.

Examples:

• 行くことにしました = I decided to go
• 勉強することにしました = I decided to study
• 今日は早く寝ることにしました = I decided to go to bed early today

It often sounds a little more deliberate than just saying 休みます.

Japanese often omits the subject when it is understood from context.

In this sentence, the subject is naturally understood as the speaker:

• (私は) 今日は家で休むことにしました。

Japanese avoids repeating subjects like I much more than English does. If the context is clear, leaving it out sounds more natural.

So although English usually needs I decided to rest at home today, Japanese does not need to say 私は here.

It suggests the speaker was not feeling well, but it does not state a specific diagnosis.

The clues are:

• 鼻声だった = had a nasal/congested voice
• 肩に湿布も貼っていた = had a patch on the shoulder

Together these give the impression that the speaker was physically uncomfortable, possibly with a cold, fatigue, pain, or general poor condition. Japanese often describes symptoms or circumstances rather than explicitly saying I was sick.

So the sentence sounds natural and realistic without directly stating a medical condition.

Yes, から would be grammatically possible:

• 鼻声だったし、肩に湿布も貼っていたから、今日は家で休むことにしました。

But ので tends to sound a bit more:

• explanatory
• softer
• less blunt

While から can sound a bit more direct.

In a sentence like this, ので fits well because the speaker is calmly explaining the reason for their decision.

Very roughly:

• から = because, so
• ので = because, since, given that

Both are common, but ので often feels slightly more gentle or formal.

No. In normal Japanese writing, the sentence would usually be written without spaces:

朝から鼻声だったし、肩に湿布も貼っていたので、今日は家で休むことにしました。

Spaces are often added in learning materials to make it easier to see the parts of the sentence.

So the spaced version is just for study support, not standard native writing.