गाँव पहुँचने के बाद मैं आपको फोन करूँगी।

पहुँचने is the oblique infinitive form of पहुँचना (to reach / to arrive).
When you put this form before के बाद, it creates the meaning after reaching or after arriving.

So:

• पहुँचना = to reach
• पहुँचने के बाद = after reaching

This is a very common pattern in Hindi:

• खाने के बाद = after eating
• सोने के बाद = after sleeping
• घर जाने के बाद = after going home

So गाँव पहुँचने के बाद literally means after reaching the village.

Because के बाद requires the verb to appear in its oblique infinitive form, not the plain dictionary form.

Compare:

• dictionary form: पहुँचना
• oblique infinitive: पहुँचने

This happens with several postpositions and expressions in Hindi. When a verb is used in a structure like after doing, before doing, etc., Hindi often uses this -ने form:

• आने के बाद = after coming
• जाने से पहले = before going
• करने के लिए = in order to do / for doing

So पहुँचने is not random—it is required by the grammar of के बाद.

In Hindi, बाद usually works with के in this kind of phrase.

So the structure is:

[noun or oblique infinitive] + के बाद = after ...

Examples:

• खाने के बाद = after eating
• काम के बाद = after work
• स्कूल के बाद = after school

So:

• पहुँचने के बाद = after reaching
• गाँव पहुँचне के बाद = after reaching the village

You should learn के बाद as a unit.

करूँगी is the first person singular future form of करना used by a female speaker.

So:

• मैं ... करूँगा = I will ... (said by a male speaker)
• मैं ... करूँगी = I will ... (said by a female speaker)

That means this sentence is being spoken by a woman or girl.

If a man said it, it would be:

गाँव पहुँचने के बाद मैं आपको फोन करूँगा।

Hindi very often uses a noun + करना construction for actions, especially with many modern or borrowed words.

So:

• फोन करना = to make a phone call / to phone
• मैसेज करना = to message
• ईमेल करना = to email
• ड्राइव करना = to drive

Here, फोन is treated like a noun/borrowed action word, and करना supplies the verb meaning.

So फोन करूँगी literally looks like will do a phone, but naturally it means I will call / I will phone.

Because आपको is the form used for to you or you as the recipient of the action.

In this sentence, the speaker is calling you, so Hindi uses को with आप:

• आप = you
• आपको = to you / you

With verbs like फोन करना, बताना, दिखाना, देना, etc., Hindi often uses को for the person receiving the action.

Examples:

• मैं आपको बताऊँगा। = I will tell you.
• मैं आपको लिखूँगी। = I will write to you.
• मैं आपको फोन करूँगी। = I will call you.

Yes, but the level of politeness changes.

• आपको = polite/formal you
• तुम्हें / तुमको = informal but normal you
• तुझे / तुझको = very informal, intimate, or sometimes rude depending on context

So the sentence could become:

• गाँव पहुँचने के बाद मैं तुम्हें फोन करूँगी। = I’ll call you after reaching the village.
• गाँव पहुँचने के बाद मैं तुझे फोन करूँगी। = same basic meaning, but much more intimate/informal

Use आपको when speaking respectfully.

Because गाँव is the destination connected with पहुँचना.

Hindi often places the destination before the infinitive in this kind of construction:

• घर जाने के बाद = after going home
• दिल्ली पहुँचने के बाद = after reaching Delhi
• ऑफिस आने के बाद = after coming to the office

So:

• गाँव पहुँचने = reaching the village
• गाँव पहुँचने के बाद = after reaching the village

This ordering is very natural in Hindi.

Because पहुँचना often takes the destination directly, without में.

So Hindi commonly says:

• घर पहुँचना = to reach home
• स्टेशन पहुँचना = to reach the station
• गाँव पहुँचना = to reach the village

Adding में is usually not needed here.

That said, Hindi can sometimes use other postpositions depending on meaning or style, but in a basic sentence like this, गाँव पहुँचना is the normal structure.

Yes, somewhat. Hindi word order is more flexible than English, though some versions sound more natural than others.

The given sentence:

गाँव पहुँचने के बाद मैं आपको फोन करूँगी।

is very natural.

You could also say:

मैं गाँव पहुँचने के बाद आपको फोन करूँगी।

This is also natural and means the same thing.

In Hindi, the main verb usually comes at the end, and time phrases such as गाँव पहुँचने के बाद can often move around for emphasis or flow.

Here it is clearly future tense.

The form करूँगी means I will do (female speaker). So फोन करूँगी means I will call.

Compare:

• फोन करती हूँ = I call / I am calling / I do call
• फोन किया = called / did call
• फोन करूँगी = will call

So the sentence expresses a future action that will happen after another action is completed.

In गाँव, the mark ँ indicates nasalization.

So गाँव is pronounced roughly like gaãv—the vowel is nasalized.
It is not pronounced exactly like plain गाव.

For learners, the important thing is to notice that:

• ँ adds a nasal quality to the vowel
• व at the end here sounds like a soft v/w sound depending on accent

You do not need perfect nasalization right away, but it is good to notice it because it is part of the standard pronunciation and spelling.

Yes. Even if the exact English meaning is shown elsewhere, grammatically the Hindi sentence can naturally correspond to English ideas like:

• after reaching the village
• once I reach the village
• when I’ve reached the village

The Hindi structure focuses on the sequence:

1. first, reaching the village
2. then, calling you

So the core idea is that the phone call happens after arrival.