المرشد يشرح قواعد الزيارة دائما.

In Arabic, both verb–subject–object and subject–verb–object word orders are possible.

• يشرح المرشد قواعد الزيارة دائما = The guide explains the visit rules always / The guide always explains...
• المرشد يشرح قواعد الزيارة دائما = The guide explains...

Starting with المرشد puts a little more focus on the guide as the topic. This subject-first order is very common in Modern Standard Arabic, especially in clear, neutral statements.

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

• مرشد = a guide / guide
• المرشد = the guide

So the noun is definite here, just like the guide in English.

يشرح is the imperfect verb form from the root related to explaining. In context, it means:

• he explains
• he is explaining
• sometimes he will explain, depending on context

In this sentence, because of دائما (always), it is understood as a habitual action:

• He always explains
• The guide always explains

Arabic does not need a separate word like English does or is here.

Arabic does not use an extra helping verb like English do/does for ordinary present-tense statements.

English:

• The guide does explain...
• The guide explains...

Arabic simply uses the main verb:

• المرشد يشرح...

So يشرح already contains the idea of he explains.

قواعد means rules. It is the plural of قاعدة (rule, base, depending on context).

So:

• قاعدة = rule
• قواعد = rules

In the sentence, قواعد is the direct object of يشرح:

• The guide explains the rules...

This is a broken plural, which means the plural is formed by changing the pattern of the word, not just adding a regular ending.

قواعد الزيارة is an iḍāfa construction, often called a genitive construction or noun + noun possession/association structure.

It literally works like:

• rules of the visit
• visit rules

So:

• قواعد = rules
• الزيارة = the visit

Together:

• قواعد الزيارة = the rules of the visit / visit rules

Arabic often uses this structure where English might use of or a noun used adjectivally.

Using لـ would change the meaning. قواعد للزيارة would sound more like rules for the visit, which is similar but not exactly the same structure.

This is a very common Arabic pattern. In an iḍāfa construction, the first noun usually does not take الـ, but the whole phrase can still be definite because the second noun is definite.

So:

• قواعد زيارة = rules of a visit / visit rules (indefinite)
• قواعد الزيارة = the rules of the visit (definite)

Even without الـ on قواعد, the phrase becomes definite because الزيارة is definite.

Because ز is a sun letter. When الـ comes before a sun letter, the l sound of الـ is not pronounced, and the next consonant is doubled.

So:

• Written: الزيارة
• Pronounced: az-ziyārah

This is a pronunciation rule only; the spelling does not change.

By contrast, in المرشد, the letter م is a moon letter, so the l is pronounced:

• al-murshid

دائما means always.

In Arabic, adverbs like دائما can often move around more flexibly than in English, but putting it at the end is very natural:

• المرشد يشرح قواعد الزيارة دائما

This gives:

• The guide explains the rules of the visit always which we normally translate more naturally as
• The guide always explains the rules of the visit

So the end position is perfectly normal in Arabic.

The word دائما is often used as an adverb in the accusative form, traditionally called منصوب.

That final -an sound is very common in adverbial expressions in Arabic. You will often see words like:

• دائما = always
• غالبا = غالبًا = usually
• أحيانا = أحيانًا = sometimes

In fully vowelled Arabic, دائما is written دائمًا.

In everyday unvowelled text, learners usually just memorize it as the common adverb meaning always.

Yes. In fully vowelled, formal Arabic, the sentence could be shown with case endings like this:

المرشدُ يشرحُ قواعدَ الزيارةِ دائمًا

Here is what those endings show:

• المرشدُ = subject, so nominative
• يشرحُ = indicative verb form
• قواعدَ = direct object, so accusative
• الزيارةِ = second noun in iḍāfa, so genitive
• دائمًا = adverbial accusative expression

In normal Arabic writing, these short vowel endings are usually omitted, so learners have to infer them from grammar.

By itself, يشرح can sometimes mean is explaining as well as explains. The Arabic imperfect often covers both simple present and present progressive meanings.

However, in this sentence, دائما strongly suggests a habitual meaning:

• The guide always explains the visit rules

So here it is understood as a repeated or regular action, not something happening only right now.