أمشي نحو المحطة.

Because the verb itself already tells you the subject. أمشي is the 1st person singular form of the imperfect verb, so أنا is understood automatically.

You can say أنا أمشي نحو المحطة if you want emphasis or clarity, but in normal Arabic it is very common to leave أنا out.

أمشي is the imperfect (non-past) form of the verb مشى.

In this sentence, it can mean things like:

• I walk
• I am walking

The exact English tense depends on context. Arabic often uses the imperfect where English might choose either simple present or present progressive.

That initial أ is the prefix that marks 1st person singular in the imperfect tense.

A very simplified pattern is:

• أمشي = I walk
• تمشي = you walk / she walks
• يمشي = he walks
• نمشي = we walk

So the أ- is doing important grammatical work.

نحو means toward or in the direction of. It connects the verb to the destination.

So grammatically, it works like a preposition here. The station is not a direct object of أمشي; it comes after نحو.

Both can be translated as something like to/toward, but the nuance is slightly different:

• نحو = toward, in the direction of
• إلى = to, often with a clearer sense of reaching the endpoint

So أمشي نحو المحطة emphasizes direction, while أمشي إلى المحطة can sound more like I am walking to the station as a destination.

In many contexts, both are possible.

Because the noun is definite: the station, not just a station.

• محطة = station
• المحطة = the station

Arabic uses الـ as the definite article, roughly like English the.

That final ة is called tāʾ marbūṭa. It often marks a noun as feminine.

So محطة is a feminine noun. This matters for agreement later if you add adjectives or refer back to it. For example:

• المحطة الكبيرة = the big station

The adjective also appears in the feminine form.

After نحو, المحطة is genitive.

In a fully vowelled form, you could write:

أَمْشِي نَحْوَ الْمَحَطَّةِ

Notice the ending -ِ on المحطةِ in full MSA case marking.

In normal everyday writing, these short vowels are usually omitted, so you just see المحطة.

A helpful pronunciation guide is:

ʾamshī naḥwa al-maḥaṭṭa

A few important points:

• sh in أمشي sounds like English sh
• ḥ is a stronger, breathier h
• ṭ is an emphatic t
• the doubled طّ should be held slightly longer
• in المحطة, the l of الـ is pronounced, because م is a moon letter, not a sun letter

Yes, but أمشي نحو المحطة is a very natural neutral order.

Other possibilities include:

• أنا أمشي نحو المحطة — adds emphasis on I
• نحو المحطة أمشي — possible, but marked and less neutral

Arabic word order is more flexible than English, but the original sentence is a standard, straightforward way to say it.

Because the verb أمشي is not acting directly on the station. You are not walking the station; you are walking toward it.

So المحطة belongs with نحو, not directly with the verb. That is why it behaves like the object of a preposition, not a direct object.

The simplest way is:

لا أمشي نحو المحطة

That means I do not walk toward the station or, depending on context, I am not walking toward the station.

So for basic present-tense negation, لا is the word to use here.