piryohamyeon mwodeunji mureobosipsio.

필요하면 comes from 필요하다 (to be necessary / to be needed) plus -면 (if / when).

So literally, 필요하면 means if it is necessary or if needed.

In natural English, that often becomes:

• if necessary
• if you need to
• if you need anything
  depending on context.

In this sentence, it sets up the condition for the request that follows.

The conditional ending is -면, but in practice it appears in two shapes:

• after a vowel: -면
• after a consonant: -으면

Since 필요하다 has the stem 필요하-, which ends in a vowel, you use -면:

• 필요하- + 면 → 필요하면

So 필요하면 is the correct form.

뭐 is the common spoken form of 무엇, both meaning what.

So:

• 무엇이든지 = anything / whatever
• 뭐든지 = the more natural everyday version

In modern Korean, 뭐든지 sounds much more natural in normal speech.
무엇이든지 is understandable, but it can sound more formal or stiff.

뭐든지 means anything, whatever, or no matter what.

It is built from:

• 뭐 = what
• -든지 = whether it is X or Y / any / no matter which

So 뭐든지 물어보십시오 means something like:

• Ask anything
• Ask whatever you want
• Feel free to ask anything

It gives a broad, open-ended meaning.

In Korean, object particles such as -을 / -를 are often omitted when the meaning is already clear.

So the fuller form could be:

• 뭐든지를 물어보십시오

But in natural Korean, that often becomes simply:

• 뭐든지 물어보십시오

This omission is very common and sounds natural.

물어보십시오 is a very polite, formal way to say please ask.

It comes from 물어보다 (to ask / to inquire) plus the formal polite imperative ending -십시오.

So:

• 물어보십시오 = please ask / ask, please

This style is often used in:

• customer service
• announcements
• public speaking
• manuals or written instructions
• formal classroom or workplace situations

It sounds respectful and professional.

Not really in the simple sense of see.

The base verb here is 물어보다, which is a very common verb meaning to ask or to inquire.

Historically, it can be understood as something like try asking, since -아/어 보다 can mean try doing. But in everyday Korean, 물어보다 is often just treated as a normal verb meaning ask.

So in this sentence, you should understand 물어보십시오 naturally as:

• please ask not
• please try seeing by asking

Grammatically, yes, it is an imperative form. But pragmatically, it often sounds like a polite invitation or offer, not a harsh command.

In Korean, formal imperative forms are commonly used in helpful service language. So this sentence feels more like:

• Please ask if you need anything
• Feel free to ask anything if necessary

It is polite and welcoming, not bossy.

Korean is generally a subject-object-verb language, so the main verb usually comes at the end.

English:

• If you need anything, ask.

Korean:

• If needed, anything ask-please.
• 필요하면 뭐든지 물어보십시오.

The condition comes first, and the final verb carries the main action of the sentence.

The subject is omitted because it is obvious from context.

In English, you would normally say you:

• If you need anything, ask.

In Korean, subjects and objects are often left out when they are easy to understand. Here, the listener is clearly the person who is supposed to ask, so you does not need to be stated.

This is very normal Korean.

Yes. 물어보세요 is also polite and very common.

The difference is mainly tone:

• 물어보십시오: more formal, official, professional
• 물어보세요: polite but softer and more conversational

So:

• 필요하면 뭐든지 물어보세요 sounds natural in everyday speech
• 필요하면 뭐든지 물어보십시오 sounds more formal

Both are correct.

Yes, and it would sound even more polite toward the listener.

• 필요하면 = if needed / if necessary
• 필요하시면 = if you need it / if it is necessary for you, with added respect

The -시- in 필요하시면 is an honorific element that shows respect toward the person concerned, usually the listener.

So these are both natural:

• 필요하면 뭐든지 물어보십시오
• 필요하시면 뭐든지 물어보십시오

The second one is a bit more polite and customer-service-like.

Yes, it is natural, especially in formal or polite contexts.

It would sound appropriate in situations like:

• a teacher speaking politely to students
• staff speaking to a customer
• a host addressing guests
• written instructions or formal notices

If you wanted a more casual everyday version, you might say:

• 필요하면 뭐든지 물어보세요
• 궁금한 게 있으면 뭐든지 물어보세요

But the original sentence is perfectly natural and polite.