هو ينضم إلى الفريق.

Yes. You can say:

• هو ينضم إلى الفريق.
• ينضم إلى الفريق.

Both can mean he is joining / he joins the team.

In Arabic, the verb ينضم already tells you the subject is third person masculine singular (he), so the separate pronoun هو is often unnecessary.

Including هو can add:

• emphasis
• clarity
• a stronger topic sense, like as for him, he is joining the team

ينضم is in the imperfect tense in Arabic.

The Arabic imperfect can express several ideas, depending on context:

• he joins
• he is joining
• he does join

So this sentence could mean either a present habitual action or an action happening now.

If you want a clear future meaning, Arabic often adds:

• سـ
• or سوف

For example:

• سينضم إلى الفريق = he will join the team

The dictionary form is انضمَّ.

So:

• past: انضمَّ = he joined
• present/imperfect: ينضمُّ = he joins / he is joining

This verb is commonly used with the meaning to join, to become part of, or to affiliate with something.

Because the verb انضمَّ / ينضمُّ normally goes with the preposition إلى.

So Arabic says, literally, something like:

• he joins to the team

That is just how this verb is constructed in Arabic:

• انضمَّ إلى...
• ينضمُّ إلى...

So you should learn it as a full pattern:

• ينضم إلى الفريق
• انضم إلى المجموعة
• سأنضم إلى النادي

Because الفريق is the object of the preposition إلى.

In Arabic, after a preposition, the noun comes in the genitive case.

So in fully vocalized Arabic, it would be:

• إلى الفريقِ

with a kasra at the end of الفريق.

In normal unvocalized writing, that case ending is usually not written, so you just see:

• إلى الفريق

الـ is the Arabic definite article, meaning the.

So:

• فريق = a team / team
• الفريق = the team

In this sentence, الفريق is definite, so it means the team, not just a team.

It is pronounced approximately:

• yan-ḍammu

A few things to notice:

1. The letter ض is an emphatic consonant, often transliterated as ḍ.
2. The final م is doubled in pronunciation because of the shadda:
   • ينضمّ
3. This comes from the root ض م م, which has the idea of joining or bringing together.

So the doubled sound is normal here and is part of the verb’s form.

As written, هو ينضم إلى الفريق is often treated as a nominal sentence because it begins with the pronoun هو.

But the core action is still carried by the verb ينضم.

If you remove هو, you get:

• ينضم إلى الفريق

That is clearly a verbal sentence.

So learners often notice that Arabic allows both styles:

• starting with the subject/topic
• or starting directly with the verb

Yes.

Possible versions include:

• هو ينضم إلى الفريق
• ينضم إلى الفريق

If the subject is a noun instead of a pronoun, Arabic often prefers starting with the verb:

• ينضم اللاعب إلى الفريق = the player is joining the team

Using هو at the beginning can sound more explicit or emphatic, but it is not always necessary.

The verb changes to agree with the subject.

Examples:

• هي تنضم إلى الفريق = she is joining the team
• هم ينضمون إلى الفريق = they are joining the team (masculine or mixed)
• هن ينضمن إلى الفريق = they are joining the team (feminine)
• أنتَ تنضم إلى الفريق = you are joining the team (masculine singular)
• أنا أنضم إلى الفريق = I am joining the team

So the form ينضم specifically matches he.

Yes. The root is:

• ض م م

This root has meanings related to:

• joining
• adding
• bringing together

The verb انضمَّ is built from that root in a derived pattern. Knowing the root can help you recognize related words and understand the basic meaning behind the verb.

For a learner, the most useful thing is usually to remember the full expression:

• انضمَّ إلى
• ينضمُّ إلى

rather than the root alone.

It can mean either one.

Arabic often does not separate those two ideas as strictly as English does. The context tells you which is intended.

So:

• in a general description, it may mean he joins
• in a current event context, it may mean he is joining

If the speaker wants to make time clearer, they often add other words or use context:

• الآن = now
• غدًا = tomorrow
• عادةً = usually

For example:

• هو ينضم الآن إلى الفريق = he is joining the team now
• هو ينضم عادةً إلى الفريق في التدريبات = he usually joins the team in training