अगर तुम स्टेशन पहुँच जाओ, तो मुझे एक संदेश भेज देना।

अगर ... तो ... is the Hindi equivalent of if ... then ....

• अगर = if
• तो = then

So the sentence is structured as:

• अगर तुम स्टेशन पहुँच जाओ = if you reach the station
• तो मुझे एक संदेश भेज देना = then send me a message

तो is very common, but it is not always strictly required. You could also say:

अगर तुम स्टेशन पहुँच जाओ, मुझे एक संदेश भेज देना।

That is still grammatical. Adding तो just makes the relationship between the two clauses clearer and more natural.

Literally, अगर means if. But in real usage, sentences like this can feel very close to when in English, especially if the speaker expects the event to happen.

So depending on context, this Hindi sentence could match either:

• If you get to the station, send me a message
• When you get to the station, send me a message

Hindi does not always force the same sharp if/when distinction that English does.

तुम is the familiar, informal you. It is very common between:

• friends
• siblings
• people of similar age
• someone you know fairly well

It is not rude in the right context, but it is less polite than आप.

Compare:

• तुम = informal/familiar
• आप = polite/respectful
• तू = very intimate, very casual, or potentially rude depending on context

A more polite version would be:

अगर आप स्टेशन पहुँच जाएँ, तो मुझे एक संदेश भेज दीजिए।

पहुँच जाओ is a very natural everyday way to say reach / get there / arrive in a future or conditional context.

Here, जाओ is part of a compound verb:

• main verb: पहुँच = reach
• vector verb: जाना = go

Together, पहुँच जाना often suggests successfully reaching or ending up reaching a destination.

So अगर तुम स्टेशन पहुँच जाओ feels like:

• if you get to the station
• if you manage to reach the station
• once you’ve reached the station

By contrast, पहुँचो by itself is more like a direct command: reach! That does not fit this sentence as naturally.

When जाना comes after another verb, it often acts as a vector verb and adds a nuance of:

• completion
• change of state
• successful arrival at an endpoint

So:

• पहुँचना = to reach
• पहुँच जाना = to get there, to end up reaching, to reach completely/successfully

In this sentence, it makes the arrival sound more natural and event-like. English often does not translate this extra nuance directly, but it is very common in Hindi.

With verbs like पहुँचना (to reach/arrive at), Hindi often uses the destination directly, without पर.

So both of these are possible:

• स्टेशन पहुँचना
• स्टेशन पर पहुँचना

The version without पर is very common and completely natural.

This is similar to other expressions like:

• घर पहुँचना = to reach home
• दिल्ली पहुँचना = to reach Delhi

Adding पर is not wrong, but it is often unnecessary.

This is another very common Hindi compound verb.

• भेजना = to send
• भेजो = send! (plain imperative)
• भेज देना = send it off / do send / send it once you can

The देना here does not literally mean give in the usual sense. It acts as a vector verb and often adds a sense of:

• completion
• casual helpfulness
• a softer, more natural request

So मुझे एक संदेश भेज देना sounds more natural and less blunt than just मुझे एक संदेश भेजो.

In everyday Hindi, X कर देना is extremely common for polite or casual instructions:

• बता देना = let me know
• फोन कर देना = give me a call
• भेज देना = send it over

Yes, मुझे and मुझको both mean to me here.

• मुझे is more common in everyday speech
• मुझको is also correct, and can sometimes sound slightly more emphatic or careful

So both are fine:

• मुझे एक संदेश भेज देना
• मुझको एक संदेश भेज देना

In this sentence, मुझे is the most natural everyday choice.

Correct: Hindi does not have articles exactly like English a/an/the.

But एक often works a lot like a/an in context.

So:

• एक संदेश = a message / one message

In this sentence, एक sounds natural and helps the phrase feel complete. It does not strongly emphasize the number one unless the context makes it important.

You could also omit it:

मुझे संदेश भेज देना

That is still understandable, but मुझे एक संदेश भेज देना sounds more natural in many situations.

संदेश is perfectly correct and clear. It means message.

However, in everyday spoken Hindi, many people would more often say:

• मैसेज = message
• एसएमएस = SMS/text message

So these are also very natural:

• मुझे एक मैसेज भेज देना
• स्टेशन पहुँच जाओ तो मुझे मैसेज कर देना

Using संदेश can sound slightly more neutral or formal than मैसेज, but it is not unnatural.

Hindi usually follows Subject–Object–Verb order, unlike English, which is usually Subject–Verb–Object.

So the request part is arranged like this:

• मुझे = to me
• एक संदेश = a message
• भेज देना = send

Literally, the order is closer to:

to me a message send

That is normal in Hindi.

You can move things around for emphasis, but the verb typically stays at the end:

• मुझे एक संदेश भेज देना = neutral
• एक संदेश मुझे भेज देना = extra emphasis on a message
• मुझे भेज देना एक संदेश = generally less natural

It is better to think of the sentence as a conditional + instruction, rather than a simple future tense sentence.

• अगर तुम स्टेशन पहुँच जाओ = a future-related condition
• मुझे एक संदेश भेज देना = an instruction/request

So the sentence is about a future situation, but Hindi is not using the same kind of future marking that English often would.

That is why it does not need something like will in the same way English does.

It is pronounced roughly like pahunch.

A few useful points:

• प = p
• ह = h
• ुँ nasalizes the vowel
• च = ch

So the sound is approximately:

pə-hũch

The nasal mark ँ means the vowel is nasalized. In practice, many learners hear it as something close to pahunch.

You will often see it written in Roman letters as:

• pahunch
• sometimes pahuñch

Both are trying to represent the same Hindi word.

A polite version with आप would be:

अगर आप स्टेशन पहुँच जाएँ, तो मुझे एक संदेश भेज दीजिए।

You could also say:

अगर आप स्टेशन पहुँच जाएँ, तो मुझे एक संदेश भेज दें।

Both are polite. The first one, भेज दीजिए, sounds a bit fuller and slightly more courteous. The second, भेज दें, is also very common and natural.