يذهب نحو الباب.

Because the verb يذهب already tells you the subject is he in Modern Standard Arabic.

• يذهب = he goes / he is going
• Arabic verbs usually encode the subject, so a separate pronoun is often unnecessary.

If you wanted to add the pronoun, you could say هو يذهب نحو الباب, but that is usually more emphatic than necessary.

يذهب is in the imperfect form.

In English, that can correspond to several ideas depending on context, such as:

• he goes
• he is going
• sometimes even he will go

By itself, the Arabic form does not force just one English tense. Context decides whether it is habitual, present, or future.

A fully vocalized pronunciation is:

يَذْهَبُ نَحْوَ البَابِ
yadhhabu naḥwa al-bābi

A few pronunciation notes:

• ذ sounds like the th in this
• ح is a deeper, breathier sound than normal English h
• ال in الباب is pronounced clearly here: al-, because ب is a moon letter, so the l does not disappear

Here نحو means toward, in the direction of, or towards.

It focuses on movement in a direction, not just location.

So the sentence gives the idea of moving toward the door.

Also, نحو can have other meanings in other contexts, but in this sentence it is a direction word.

Yes, often you can.

• يذهب نحو الباب = he goes toward the door
• يذهب إلى الباب = he goes to the door

The difference is small but useful:

• نحو emphasizes direction
• إلى emphasizes the destination/end point

So نحو الباب can sound a little more like in the direction of the door, while إلى الباب sounds a little more like to the door.

Because الباب means the door, while باب means a door or just door in an indefinite sense.

The prefix الـ is the Arabic definite article, equivalent to the.

So:

• باب = a door / door
• الباب = the door

In fully vocalized Modern Standard Arabic, you would usually see:

يَذْهَبُ نَحْوَ البَابِ

So the endings are:

• يذهبُ with ḍamma
• نحوَ with fatḥa
• البابِ with kasra

Why?

• يذهبُ is a normal indicative imperfect verb
• نحوَ is functioning as a directional expression
• البابِ is in the genitive after نحو in this structure

In everyday writing, these short vowels are usually omitted, so learners have to infer them from grammar.

Because Arabic very commonly uses verb-first word order, especially in simple verbal sentences.

So يذهب نحو الباب is a normal Arabic sentence pattern:

• verb
  • rest of the sentence

Arabic can also use other orders, but verb-first is extremely common in Modern Standard Arabic.

Yes.

That is very normal in Arabic. The imperfect verb يذهب can cover both:

• a simple present meaning: he goes
• a progressive meaning: he is going

The exact meaning depends on context.

If the sentence appears in a story, it may feel like he is going toward the door.
If it is describing a habit or repeated action, it may feel more like he goes toward the door.

The root is ذ-ه-ب.

This root is associated with the idea of going.

The basic past-tense form is:

• ذَهَبَ = he went

From that, the imperfect form is:

• يَذْهَبُ = he goes / he is going

Recognizing roots is very helpful in Arabic, because many related words come from the same three consonants.