صديقي يغلق باب البيت بالمفتاح في المساء.

صديقي means my friend.

The ending -ي is a possessive suffix meaning my. So:

• صديق = friend
• صديقي = my friend

Arabic often attaches possessive pronouns directly to the noun instead of using a separate word like English my.

Arabic verbs already show the subject in their form. The verb يغلق means he closes / he is closing, so the idea of he is built into the verb.

That means Arabic does not need a separate pronoun here. If you added هو, it would usually be for emphasis, not because grammar requires it.

So:

• يغلق = he closes
• هو يغلق = he closes with extra emphasis on he

يغلق is in the imperfect form, which is commonly used for:

• the present: he closes
• the habitual present: he closes regularly
• sometimes the near future, depending on context

In this sentence, it is most naturally understood as he closes or he is closing.

Arabic does not divide the present as neatly as English does. Very often, context tells you whether it is more like closes or is closing.

This sentence uses subject–verb order:

• صديقي يغلق... = My friend closes...

That is perfectly normal in Arabic, especially when the speaker wants to highlight the subject.

Arabic also allows verb–subject order:

• يغلق صديقي باب البيت...

Both are grammatical. Very roughly:

• صديقي يغلق... puts a little more focus on my friend
• يغلق صديقي... is often a more neutral, narrative-style order

باب البيت is an iḍāfa construction, often called a genitive construction or noun + noun possession structure.

It literally works like:

• باب = door
• البيت = the house
• باب البيت = the door of the house

In an iḍāfa:

1. The first noun does not take ال
2. The second noun can be definite, and that makes the whole phrase definite

So:

• باب بيت = a house door / the door of a house
• باب البيت = the door of the house

That is why الباب البيت is not correct here.

Because in an iḍāfa construction, definiteness comes from the second noun.

In باب البيت:

• البيت is definite because it has ال
• therefore the whole phrase باب البيت becomes definite: the door of the house

So even though باب itself has no ال, the whole expression is still definite.

This is a very common pattern in Arabic.

Here بـ means with or by means of.

So:

• مفتاح = key
• بالمفتاح = with the key / using the key

This بـ is a very common preposition in Arabic. It can have several meanings depending on context, including:

• with
• by
• by means of
• sometimes in

In this sentence, the most natural meaning is with the key.

Because short prepositions in Arabic are normally attached directly to the following word in writing.

So:

• بـ
  • المفتاح becomes بالمفتاح

This is very common. The same happens with other prepositions and particles, for example:

• في البيت = in the house
• بالبيت = with/in the house, depending on context
• للبيت = for the house

So بالمفتاح is not a special word by itself; it is simply بـ attached to المفتاح.

Both are possible in Arabic, but they are slightly different in style.

• في المساء = in the evening
• مساءً = in the evening / evenings / one evening, depending on context

في المساء is very clear and straightforward. It uses a preposition plus a noun, just like English in the evening.

Using مساءً by itself is also common, but it is a different structure called an adverbial accusative of time. For many learners, في المساء is easier to recognize and understand.

Yes. Arabic word order is flexible, especially with time expressions.

For example, these are all possible:

• صديقي يغلق باب البيت بالمفتاح في المساء
• في المساء صديقي يغلق باب البيت بالمفتاح
• صديقي في المساء يغلق باب البيت بالمفتاح

The most neutral version here is the original one, with the time phrase at the end. Putting في المساء earlier can add emphasis to the time.

A careful fully vocalized reading would be:

صَديقي يُغلِقُ بابَ البَيتِ بالمِفتاحِ في المَساءِ

A rough transliteration is:

ṣadīqī yugliqu bāba al-bayti bil-miftāḥi fī al-masāʾi

A few useful notes:

• يُغلِقُ = yugliqu
• بابَ has -a because it is the direct object
• البيتِ has -i because it is the second noun in the iḍāfa
• بالمفتاحِ has -i because it comes after the preposition بـ
• في المساءِ also ends with -i because في is a preposition

In everyday writing, these short vowels are usually omitted.

Here is the basic breakdown:

• صديقي = the subject, my friend
• يغلق = the verb, closes / is closing
• باب البيت = the direct object, the door of the house
• بالمفتاح = prepositional phrase, with the key
• في المساء = prepositional phrase of time, in the evening

So the structure is:

subject + verb + object + instrument + time

Yes. يغلق comes from a verb meaning to close or to shut.

In English, close and shut are often both possible translations. The best choice depends on the context and on the translation style.

So this sentence could be understood as:

• My friend closes the door of the house with the key in the evening
• My friend shuts the house door with the key in the evening

Usually closes is the most neutral choice.

Because المساء here means the evening in a general time-expression sense, just like English in the evening.

Arabic often uses the definite article in time phrases of this kind:

• في الصباح = in the morning
• في المساء = in the evening
• في الليل = at night / in the night

So ال here is completely natural and does not necessarily mean one very specific evening unless the context makes it specific.