هو يسلم الوثيقة.

Because the verb already tells you the subject: يسلم is 3rd person masculine singular in the imperfect, so he is built into the verb.

That means هو is often optional. Arabic can simply say:

يسلم الوثيقة.

Adding هو usually gives extra emphasis, contrast, or clarity, like:

He is handing in the document.

So both are possible, but هو is not strictly necessary.

It is the imperfect verb form, often called the present/non-past.

In context, it can mean things like:

• he hands over the document
• he is handing over the document
• sometimes even a near-future sense, depending on context

Arabic does not have a separate verb like English is in is handing over here. The imperfect form covers both simple present and present continuous.

In normal Arabic writing, short vowels are usually not written, so يسلم can be ambiguous by itself.

If the intended meaning is he hands over / submits / delivers, it is usually read as:

يُسَلِّمُ
yusallimu

So learners often need:

• context
• a translation
• audio
• or fully vowelled text

to know the exact pronunciation.

Assuming the intended reading is يُسَلِّمُ, this is a Form II verb.

Its past form is:

سَلَّمَ
sallama

Its present/imperfect form is:

يُسَلِّمُ
yusallimu

Form II often has a doubled middle consonant, shown by a shadda. Here the ل is doubled.

This matters because different Arabic verb forms often have related but distinct meanings.

Because it has the Arabic definite article الـ, which means the.

So:

• وثيقة = a document
• الوثيقة = the document

Unlike English, Arabic attaches the article directly to the noun.

It is usually pronounced:

al-wathīqah

A few helpful points:

• ث sounds like th in think
• ي here gives a long ī sound
• the final ة is usually pronounced -ah when pausing

Also, و is a moon letter, so the ل in الـ is pronounced clearly:

al-wathīqah, not aw-wathīqah

Because Arabic usually leaves short vowels and case endings unwritten in ordinary text.

In full formal grammar, الوثيقة here is the direct object, so it is accusative:

الوَثِيقَةَ

That final -a sound is usually not written in normal script. Also, at the end of a sentence, speakers often pause and do not pronounce the final short vowel anyway.

Because it is the direct object of the verb.

In this sentence, the action is being done to the document. The verb يُسَلِّمُ is transitive here, so the thing being handed over or submitted is the direct object.

So in full case-marked Arabic:

• هو = subject
• يُسَلِّمُ = verb
• الوَثِيقَةَ = direct object in the accusative

Yes. Both are possible.

• يسلم الوثيقة = a very normal way to say it
• هو يسلم الوثيقة = also correct, but with more focus on he

So adding هو can sound more explicit or contrastive, as if you are distinguishing him from someone else.

Yes. They all come from the root:

س-ل-م

This root is associated with ideas like peace, safety, and submission.

Some related words are:

• سلام = peace
• إسلام = Islam / submission
• مسلم = Muslim
• سَلَّمَ = to hand over, deliver, submit, or in some contexts greet

Recognizing roots is very useful in Arabic, because many words belong to the same word family.

Because Arabic words often have several related meanings built from the same root and verb form.

For سَلَّمَ, common meanings include:

• to hand over / deliver / submit
• to greet

Context tells you which meaning is intended.

For example:

• سَلَّمَ عَلَيْهِ = he greeted him
• سَلَّمَ الوَثِيقَةَ = he handed over/submitted the document

So in your sentence, because the object is the document, the meaning is naturally hand over / submit / deliver, not greet.