هو يذهب مباشرة إلى المكتب.

Yes. In Arabic, يذهب already tells you the subject is he.

So هو يذهب مباشرة إلى المكتب can be understood as:

• هو = he
• يذهب = he goes

The pronoun هو is often added for emphasis, clarity, or simply because the sentence is being presented in a basic learner-friendly form.

In many real sentences, Arabic would very naturally just say:

يذهب مباشرة إلى المكتب.
= He goes directly to the office.

Here is the breakdown:

• هو = he
• يذهب = goes / is going
• مباشرة = directly
• إلى = to
• المكتب = the office

So the structure is:

• subject: هو
• verb: يذهب
• adverb: مباشرة
• prepositional phrase: إلى المكتب

يذهب is the imperfect form, which usually covers meanings like:

• he goes
• he is going
• sometimes even he will go, depending on context

In this sentence, without any future marker, the most natural meanings are:

• he goes directly to the office
• he is going directly to the office

If you want to make the future clearer, Arabic often adds:

• سـ → سيذهب
• سوف → سوف يذهب

Both mean he will go.

In this sentence, مباشرة functions like an adverb, meaning directly.

So:

• يذهب مباشرة = he goes directly

You may also see it written with full case marking as مباشرةً. In fully vocalized Arabic, that final tanwīn fatḥ often shows adverbial use.

So both of these are the same basic word in practice:

• مباشرة
• مباشرةً

In normal unvoweled writing, people usually write مباشرة.

إلى is the standard preposition meaning to / toward when showing movement toward a destination.

So:

• يذهب إلى المكتب = he goes to the office

This is the normal preposition after verbs like go.

English speakers sometimes want to translate word-for-word with some other preposition, but for destinations, إلى is the usual choice.

المكتب means the office, while مكتب means an office or just office in a general sense.

So:

• إلى المكتب = to the office
• إلى مكتب = to an office

The الـ at the beginning is the definite article, equivalent to English the.

It is pronounced al-maktab.

The م in مكتب is a moon letter, so the ل in الـ is pronounced clearly.

So:

• المكتب → al-maktab

If the noun began with a sun letter, the ل sound would assimilate, but that does not happen here.

Yes. Arabic often prefers a verb-first sentence.

So these are both possible:

• هو يذهب مباشرة إلى المكتب.
• يذهب مباشرة إلى المكتب.

Both can mean he goes directly to the office.

The version with هو is more explicitly he, while the version without it is often more natural in ordinary Arabic if the subject is already understood.

Yes, very often.

Arabic verbs usually show the subject clearly enough on their own. Since يذهب already means he goes, you can say:

يذهب مباشرة إلى المكتب.

That is a complete and natural sentence.

You are more likely to keep هو when:

• you want emphasis
• you are contrasting him with someone else
• you want extra clarity

For example:

• هو يذهب إلى المكتب، وهي تذهب إلى المدرسة.
  He goes to the office, and she goes to the school.

You would change both the pronoun and the verb:

• هي تذهب مباشرة إلى المكتب.
  = She goes directly to the office.

So:

• هو يذهب = he goes
• هي تذهب = she goes

This is a very common pattern in Arabic:

• masculine singular: يـ
• feminine singular: تـ

In Modern Standard Arabic, a simple present-tense negation is:

هو لا يذهب مباشرة إلى المكتب.

or simply:

لا يذهب مباشرة إلى المكتب.

Here:

• لا = not
• لا يذهب = he does not go / he is not going

It can mean either, depending on context.

يذهب can express:

• a habitual action: He goes directly to the office
• a current action: He is going directly to the office

Arabic often relies on context more than English does for this distinction.

If the context is about someone’s daily routine, it sounds habitual.
If the context is about what he is doing now, it can mean is going.

Yes, depending on context, مباشرة can have meanings like:

• directly
• straight
• immediately

In this sentence, the most natural meaning is usually directly, as in going straight to the office.

But in other contexts, it can mean immediately. For example, after an event, مباشرة can mean right away.

So context decides the exact shade of meaning.