Demonstratives are indeclinable definites that point to something: hādhā and hādhihi for the singular, hādhāni and hātāni for the dual (which decline), hāʾulāʾi for the plural, hunā and thamma for place. Their case position follows their role, and a noun with al- after them is a substitute or an explanatory apposition.
Demonstratives are built, like all the indeclinables, with one exception that proves instructive: the duals decline, because being dual outranks being built. The chapter's most useful rule concerns what follows them, since a single change in definiteness turns a phrase into a whole sentence. This is what separates this book from this is a book.
dhā for the masculine singular, dhī and tī for the feminine, dhāni and tāni for the dual, ulāʾi for the plural, and hunā and thamma for place.
By the end of this lesson
Three particles commonly attach to them, and none is a pronoun:
All are built and take positions. The duals alone are declined, by alif and yāʾ, because being dual outranks being built.
ذَٰلِكَ الْكِتَابُ لَا رَيْبَ فِيهِ
dhālika l-kitābu lā rayba fīhi
That is the Book, in which there is no doubt.
ذا اسم إشارة مبني على السكون في محل رفع مبتدأ، واللام للبعد والكاف للخطاب حرفان لا محل لهما، الكتابُ بدل من اسم الإشارة مرفوع وعلامة رفعه الضمة الظاهرة، لا نافية للجنس، ريبَ اسم لا مبني على الفتح في محل نصب، وخبر لا محذوف، في حرف جر، والهاء في محل جر.
Three separate things are parsed at the start: the demonstrative itself, the lām of distance, and the kāf of address. Neither particle has a position, and neither is a pronoun.
Check yourself
Correct this and explain.
رَأَيْتُ هَٰذَانِ الطَّالِبَيْنِ
raʾaytu hādhayni l-ṭālibayni.
The dual demonstrative is declined, so the accusative takes yāʾ, not alif. This is the one place demonstratives behave like ordinary nouns, and using hādhāni in every position is the commonest error in the chapter.
With al- it is a substitute; indefinite it is the predicate. One letter decides whether you have a phrase or a sentence.
هَٰذَا كِتَابٌ
hādhā kitābun
This is a book.
هذا اسم إشارة مبني على السكون في محل رفع مبتدأ، كتابٌ خبر مرفوع وعلامة رفعه الضمة الظاهرة.
Compare hādhā l-kitābu, 'this book', which is a phrase and not yet a sentence, with al-kitābu a substitute for the demonstrative. The difference between a phrase and a statement is a single al-.
hunā and hunāka point to places rather than things, and they are parsed as built adverbials.
Learners often meet these two as vocabulary and never as grammar, which leaves them unable to parse a sentence that begins with one. They are demonstratives like any other, built, and occupying the position of accusative because they answer the question where.
هُنَاكَ مَسْجِدٌ قَدِيمٌ
hunāka masjidun qadīmun
There is an old mosque there.
هناك اسم إشارة للمكان البعيد مبني على الفتح في محل نصب مفعول فيه ظرف مكان متعلق بمحذوف خبر مقدم، مسجدٌ مبتدأ مؤخر مرفوع وعلامة رفعه الضمة الظاهرة، قديمٌ نعت مرفوع.
Two things happen at once. The adverbial is fronted, and the predicate it attaches to is omitted, which is why the analysis names a deleted predicate. The kāf here is again the particle of address, exactly as in dhālika.
Three errors, and the second is about a letter that looks like a pronoun and is not.
The forms and the analysis of what follows them come from these texts.
A rule is clearest in a text you already know by heart. Each ayah below contains the very construction this lesson teaches, and every one has a full word-by-word i'rab on this site. Read the ayah first and try to find the construction yourself, then open its i'rab to check.
Common questions
Because they carry a meaning that belongs to particles, namely pointing, and words carrying particle-like meanings are built. Their endings therefore never change, and they take positions in iʿrāb rather than cases.
Because they are duals, and the dual is declined by letters: alif for the nominative, yāʾ for the accusative and genitive. So hādhāni in the nominative but hādhayni otherwise. They are the only demonstratives that decline.
By its definiteness. Carrying al-, it is a substitute for the demonstrative or an explicative apposition: hādhā l-kitābu. Indefinite, it is the predicate: hādhā kitābun, "this is a book". That difference is the key to the whole chapter.
Distance. dhā is for what is near, dhāka for what is middling, and dhālika for what is far, the lām being the marker of that distance. The kāf in both is a particle of address, not a pronoun.
Yes, demonstratives of place. hunā points to a near place and hunāka to a far one. They are built adverbials, so they are parsed as being in the position of accusative as adverbials of place.
Neither is a pronoun. The hāʾ is a particle of alerting, prefixed to draw attention, and the kāf is a particle of address. Both are built with no position in iʿrāb. Parsing the kāf as a genitive pronoun is a common error.