لن أكتب هذا أبدا.

A common pronunciation is lan aktuba hādhā abadan.

If fully vocalized, it is:

لَنْ أَكْتُبَ هٰذَا أَبَدًا

A rough breakdown:

• لَنْ = lan
• أَكْتُبَ = aktuba
• هٰذَا = hādhā
• أَبَدًا = abadan

لن is a particle used to negate the future. It often corresponds to will not or will never in English.

So in this sentence, لن tells you that the writing is being denied for the future:

• لن أكتب = I will not write

It is stronger and more specifically future-oriented than لا in many contexts.

أكتب is the first-person singular imperfect form of the verb كتب (to write).

The prefix أ- at the beginning marks I in the imperfect:

• أكتب = I write / I am writing / I will write depending on context

In this sentence, because of لن, it clearly means:

• I will not write

Because لن must be followed by an imperfect verb.

So the pattern is:

• لن + imperfect verb

Here:

• لن أكتب = I will not write

This is a very common structure in Modern Standard Arabic.

Yes. لن puts the imperfect verb into the subjunctive mood.

That is why the fully vocalized form is:

• أَكْتُبَ and not أَكْتُبُ

So:

• indicative: أكتبُ
• after لن: أكتبَ

In normal unvocalized writing, you usually do not see this difference, because both are written simply as أكتب.

هذا means this and is the masculine singular demonstrative.

It can be used:

• before a noun: هذا الكتاب = this book
• by itself as a pronoun: this

In لن أكتب هذا أبدا, it is being used by itself, meaning this or this thing.

Because هذا is the masculine singular form.

• هذا = this for masculine nouns
• هذه = this for feminine nouns

If the thing being referred to were feminine, you would use هذه instead.

Because it is the object of the verb.

Arabic often places the verb before its object:

• أكتب هذا = I write this

So in the full sentence:

• لن أكتب هذا أبدا the order is basically:
• not-future + write-I + this + ever/never

This verb-before-object order is very normal in Arabic.

أبدا adds the idea of ever / never at all.

With a negative sentence, it usually strengthens the meaning:

• لن أكتب هذا = I will not write this
• لن أكتب هذا أبدا = I will never write this

So أبدا makes the statement more emphatic.

Yes.

• لن أكتب هذا is already a correct sentence.
• Adding أبدا makes it stronger: I will never write this

So أبدا is not required for grammar, but it adds emphasis.

Because it is commonly written as أبدًا with tanwīn fatḥ.

So the pronunciation is:

• abadan

In this kind of sentence, أبدا / أبدًا functions like an adverb meaning never.

Very often, yes. In many common contexts, أبدا appears with negation and means never or not ever.

For example:

• ما فعلت ذلك أبدا = I never did that
• لن أنسى أبدا = I will never forget

Without negation, أبدا can have other meanings in some contexts, but for learners it is most useful to recognize it first as a common word in negative sentences meaning never.

The main difference is that لن is specifically for the future, while لا usually negates the present, a habitual action, or a general statement.

• لن أكتب هذا أبدا = I will never write this
• لا أكتب هذا أبدا = I do not write this ever / I never write this

So if you want a clear future meaning, لن is the better choice.

In practice, no visible case ending appears on هذا.

That is because هذا is a demonstrative pronoun and is treated as indeclinable in this form. Even though it is the object of the verb, you do not normally change its ending the way you would with many regular nouns.

So it stays:

• هذا

not something like a separately marked accusative form.

Roughly, yes:

• لن = will not
• أكتب = I write
• هذا = this
• أبدا = ever / never

A very literal sense would be:

• I will not write this ever

But natural English is:

• I will never write this