sinsei ni hituyouna syoumeisyo wo, kesa siyakusyo de moraimasita.

必要 is a na-adjective in Japanese. When a na-adjective directly modifies a noun, you usually add な before the noun.

• 必要 = necessary
• 必要な証明書 = a necessary certificate / a certificate that is necessary

Compare:

• この証明書は必要です。 = This certificate is necessary.
• 必要な証明書 = the necessary certificate

So な is there because 必要 is describing 証明書.

In 申請に必要な, the particle に means something like for.

So:

• 申請 = application
• 申請に必要な = necessary for an application

A very common pattern is:

• N に必要な N = a noun that is necessary for another noun

Examples:

• 仕事に必要なスキル = skills necessary for work
• 旅行に必要な物 = things necessary for a trip

So here, the certificate is not “applying” to something; it is a certificate needed for the application.

を marks the direct object of the verb.

The verb here is もらいました (received), so the thing that was received is marked with を:

• 証明書をもらいました = received a certificate

That means 証明書 is the thing the speaker got.

Here, で marks the place where the action happened.

• 市役所で もらいました = received it at city hall

Japanese often uses:

• で for the location of an action
• に for a destination, existence, or a specific point of arrival

Compare:

• 市役所で申請しました。 = I applied at city hall.
• 市役所に行きました。 = I went to city hall.

In this sentence, the important action is receiving, and that action took place at city hall, so で is natural.

Time words like 今朝 often appear without any particle.

So:

• 今朝もらいました = received it this morning

This is very common with words such as:

• 今日 = today
• 明日 = tomorrow
• 昨日 = yesterday
• 今朝 = this morning

You sometimes see に with specific clock times or dates:

• 三時に = at three o’clock
• 月曜日に = on Monday

But 今朝に sounds unnatural in normal speech.

もらう means to receive. It often has a personal, everyday feel: someone gives something to you, and you receive it.

So 証明書をもらいました means:

• I received the certificate
• I got the certificate

In this context, it can sound a little more conversational than a more formal verb like 受け取りました or 受領しました.

So the sentence is grammatically fine, but depending on the situation, a more official-sounding sentence might use a different verb.

Yes, もらう implies that the speaker received something from someone, even if the giver is not named.

In this sentence, the giver is omitted because it is obvious from context. Since the sentence says 市役所で, the listener will naturally understand that the certificate was received from the city hall staff or office.

Japanese often leaves out information that can be understood from context.

Japanese very often omits the subject when it is clear from context.

So instead of saying:

• 私は申請に必要な証明書を、今朝市役所でもらいました。

it is very natural to simply say:

• 申請に必要な証明書を、今朝市役所でもらいました。

The listener will usually understand that the speaker means I unless something else suggests another subject.

Yes. Japanese word order is fairly flexible, as long as the particles stay attached to the right words.

For example, these are all natural:

• 今朝、市役所で申請に必要な証明書をもらいました。
• 市役所で今朝、申請に必要な証明書をもらいました。
• 申請に必要な証明書を今朝、市役所でもらいました。

The final verb usually stays at the end, but the other parts can move around for emphasis or flow.

The comma is mainly for readability or a slight pause. It does not change the basic grammar.

• 証明書を、今朝市役所でもらいました。

This can make the object stand out a bit, or simply make the sentence easier to read.

Without the comma, the sentence is still correct:

• 申請に必要な証明書を今朝市役所でもらいました。

Japanese commas are often more flexible than English commas.

Yes. 申請に必要な modifies 証明書, so the whole chunk works as one noun phrase.

Structure:

• 申請に必要な = necessary for the application
• 証明書 = certificate

Together:

• 申請に必要な証明書 = the certificate necessary for the application

This whole phrase is then marked by を as the object of もらいました.

もらいました is:

• past tense
• polite form

Breakdown:

• dictionary form: もらう
• polite non-past: もらいます
• polite past: もらいました

So it means received/got in a polite way.

If you made it plain casual speech, it would be:

• もらった

So the sentence in casual style would be:

• 申請に必要な証明書を、今朝市役所でもらった。

Here are the standard readings:

• 申請 → しんせい
• 必要 → ひつよう
• 証明書 → しょうめいしょ
• 今朝 → けさ
• 市役所 → しやくしょ
• もらいました → もらいました

A few notes:

• 今朝 is read けさ, not a reading based directly on the individual kanji.
• 市役所 is pronounced しやくしょ, though in fast speech it may sound a bit like しゃくしょ to learners.