أحب هذه الشقة لأنها هادئة.

Because أحب already means I love or I like by itself. In Arabic, the verb often includes the subject, so you do not need to say أنا unless you want extra emphasis.

• أحب = I love / I like
• أنا أحب = I love / I like, but with extra emphasis on I

So in this sentence, أحب alone is completely normal.

هذه means this for a feminine singular noun.

The noun الشقة (the apartment) is feminine, so the demonstrative must match it:

• هذا = this (masculine)
• هذه = this (feminine)

So:

• هذه الشقة = this apartment

You use هذه because شقة is feminine.

In Arabic, many nouns are grammatically feminine, and شقة is one of them. A very common sign of a feminine noun is ـة (called taa marbuuTa), which you see at the end of شقة.

So:

• شقة = apartment
• ends in ـة, so it is usually feminine

Because it is feminine, other words referring to it must also be feminine, such as هذه and هادئة.

In Arabic, the present-tense to be is usually not expressed with a separate word.

So English:

• it is quiet

becomes Arabic:

• هي هادئة
• literally: it quiet

In your sentence:

• لأنها هادئة = because it is quiet

This is completely normal in Arabic. If you wanted past or future, then Arabic would use different structures, but in the present tense there is usually no visible word for is.

It is written as one word, but it contains more than one part:

• لأن = because
• ها = her / it (feminine singular pronoun)

So:

• لأنها = because it / because she
• in this sentence: because it is, referring to the apartment

Since الشقة is feminine, Arabic uses the feminine pronoun ها here.

Because هادئة is an adjective describing الشقة, and adjectives in Arabic usually agree with the noun they describe in gender and number.

• masculine: هادئ = quiet
• feminine: هادئة = quiet

Since الشقة is feminine, the adjective must also be feminine:

• الشقة هادئة = the apartment is quiet

This agreement is one of the most important patterns in Arabic grammar.

Because هادئة here is not being used as an adjective directly inside a noun phrase like the quiet apartment. Instead, it is the predicate in a sentence meaning the apartment is quiet.

Compare:

1. هذه الشقة الهادئة
   = this quiet apartment
   Here, الهادئة has الـ because it directly modifies the noun inside the phrase.

2. هذه الشقة هادئة
   = this apartment is quiet
   Here, هادئة is the predicate, so it is usually indefinite and does not take الـ.

That is why your sentence uses هادئة, not الهادئة.

In careful pronunciation, the الـ before ش is affected because ش is a sun letter. That means the l sound of الـ is not pronounced, and the next consonant is doubled.

So الشقة is pronounced roughly:

• ash-shaqqa

not:

• al-shaqqa

Also, the ّ on ق means the q sound is doubled.

It can mean either love or like, depending on context.

• أحب هذه الشقة could be understood as I love this apartment
• or more naturally in some contexts, I like this apartment

Arabic أحب often sounds stronger than simple English like, but in everyday translation the best choice depends on tone and situation.

The sentence can be divided into two parts:

• أحب هذه الشقة = I like/love this apartment
• لأنها هادئة = because it is quiet

So the overall structure is:

• verb + object + reason clause

More literally:

• أحب = I love
• هذه الشقة = this apartment
• لأنها هادئة = because it is quiet

This is a very common and natural sentence pattern in Arabic.

Yes, absolutely. That sentence is also correct.

• أحب هذه الشقة لأنها هادئة = normal, neutral
• أنا أحب هذه الشقة لأنها هادئة = correct, with extra emphasis on I

Arabic often leaves out subject pronouns when the verb already makes the subject clear. Adding أنا is usually for contrast, emphasis, or clarity.