In short

Every language needs a way to say “and”, “or” and “but”. Arabic keeps a short list of joining particles - the traditional lists count nine or ten - and six of them do almost all the everyday work: وَ، فَـ، ثُمَّ، أَوْ، لٰكِنْ، بَلْ. Each joins two words (tea and coffee) or two whole sentences (I came in and I sat down) with no change of shape. Three of the six are two letters long, and two of them are so common that Arabic prose leans on them the way English leans on full stops.

One piece of grammar comes attached, and it is why this lesson waited until you had the cases: the second item copies the case of the first. جاءَ عَلِيٌّ وَخالِدٌ has two ـٌ, رَأَيْتُ عَلِيًّا وَخالِدًا has two ـً, and getting that wrong is the single most audible slip in this area. There is also one spelling rule that costs nothing to obey and looks wrong the moment you break it: وَ and فَـ are written stuck to the next word, never with a space.

The rule

1. Three names for the pieces. The joining particle is a حَرْفُ عَطْفٍ. The item in front of it - the one already in the sentence - is the المَعْطوفُ عَلَيْهِ. The item after it, the one being added, is the المَعْطوف:

جاءَ عَلِيٌّ وَخالِدٌ. - المَعْطوفُ عَلَيْهِ = عَلِيٌّ، حَرْفُ العَطْف = وَ، المَعْطوف = خالِدٌ.

You need the names because they make the next rule sayable in one line, and because Arabic grammar files this construction with the adjective of lesson 8 under التَّوابِع, “the followers” - words whose ending is decided by another word rather than by their own job.

2. The governing rule: المَعْطوف copies the case. This is called تَبَعِيَّة. Whatever ending the first item carries, the second item carries the same one - because the two share one job in the sentence. One pair of names, three sentences:

• مَرْفوع: جاءَ عَلِيٌّ وَخالِدٌ. - both are the subject, so both take ـٌ.
• مَنْصوب: رَأَيْتُ عَلِيًّا وَخالِدًا. - both are the object, so both take ـً.
• مَجْرور: سَأَلْتُ عَنْ عَلِيٍّ وَخالِدٍ. - one preposition covers both, so both take ـٍ.

The same thing with the article instead of tanwīn: في البَيْتِ وَالمَدْرَسَةِ - the preposition في puts البَيْتِ in the genitive, and المَدْرَسَةِ follows it there. Note what is not copied: only the case travels. Each noun keeps its own definiteness, its own gender and its own number - جاءَ الأَبُ وَأَوْلادُهُ، اِشْتَرَيْتُ الكِتابَ وَقَلَمًا. Compare the adjective of lesson 8, which has to match its noun in all four of case, definiteness, gender and number. المَعْطوف matches in one.

3. وَ and فَـ are written joined - always. These two are single letters, and Arabic never leaves a single-letter word standing alone, exactly as with بِـ، لِـ، كَـ and the سَـ of lesson 24. Write وَالبِنْتُ، وَخالِدٌ، فَجَلَسَ، فَنامَ - never *وَ البِنْتُ، never *فَ جَلَسَ. A space there is as wrong as writing *ال بَيْت.

The other four - ثُمَّ، أَوْ، لٰكِنْ، بَلْ - are ordinary separate words with a space on both sides. Two small sound notes that follow from the writing: before الـ, the alif is هَمْزَةُ الوَصْل and is not pronounced, so وَالمَدْرَسَةِ is heard as one run of sound; and لٰكِنْ and بَلْ end in a sukūn, so when الـ follows they take a helping kasra - لٰكِنِ الحَديقَةُ واسِعَةٌ، بَلِ الكِتابُ الآخَرُ. That is the same helping vowel you met on هَلِ in lesson 15.

4. وَ - plain joining, no order implied. وَ is the workhorse. It adds one thing to another and says nothing at all about which came first or why:

• Two nouns: القَهْوَةُ وَالشّايُ.
• Two sentences: أَنا في المَكْتَبِ وَأَخي في البَيْتِ.
• Two verbs with the same subject: يَقْرَأُ وَيَكْتُبُ.

Two habits of Arabic to copy here. First, in a list Arabic normally gives every item its own وَ, where English uses commas and one final “and”: اِشْتَرَيْتُ خُبْزًا وَجُبْنًا وَزَيْتونًا. Second, Arabic begins sentences and paragraphs with وَ far more freely than English does; the schoolroom rule “never start a sentence with and” has no Arabic equivalent. Because وَ carries no sense of sequence, “and then” needs one of the next two particles instead.

5. فَـ - immediately after, or therefore. فَـ adds a second event that follows the first with no gap, and often because of it. English needs several words for this and Arabic needs one letter:

• دَخَلَ فَجَلَسَ. - He came in and (at once) sat down.
• شَرِبَ الدَّواءَ فَنامَ. - He took the medicine and (so) fell asleep.
• سَقَطَ الكوبُ فَانْكَسَرَ. - The cup fell and (therefore) broke.

The two readings - “and straight away” and “and so” - are not two different particles; context picks one, and often both are true at once. فَـ joins verbs and clauses; joining two nouns with فَـ is rare and means strict order, so at this level use it between verbs.

6. ثُمَّ - then, after a gap. ثُمَّ is also “then”, but with time in between, and with no suggestion that the first event caused the second:

• شَرِبْتُ القَهْوَةَ ثُمَّ خَرَجْتُ. - I drank the coffee, then (afterwards) I went out.
• دَرَسْتُ العَرَبِيَّةَ في القاهِرَةِ ثُمَّ عُدْتُ إِلى بَلَدي.

So دَخَلَ فَجَلَسَ is one motion, دَخَلَ ثُمَّ جَلَسَ is a man who came in, did something, and sat down later. Choosing ثُمَّ where فَـ belongs is not a grammar error - it is a meaning error, and it is the one native readers notice.

7. أَوْ - or, and the question trap. أَوْ offers an alternative, in statements, in commands and in ordinary yes-or-no questions:

• سَأَذْهَبُ إِلى المَكْتَبَةِ أَوْ إِلى السّوقِ.
• خُذْ هٰذا أَوْ ذٰلِكَ.

But when the question is the choice - when you put two options to someone and ask which - Arabic switches to أَمْ, as you saw in lesson 15: أَتَشْرَبُ قَهْوَةً أَمْ شايًا؟، هَلْ تُريدُ الشّايَ أَمِ القَهْوَةَ؟ The test is simple: if the answer is “yes” or “no”, the word is أَوْ; if the answer has to be one of the two named things, the word is أَمْ. Both obey تَبَعِيَّة exactly like وَ - قَهْوَةً أَمْ شايًا has two ـً.

8. لٰكِنْ - but. لٰكِنْ contrasts, and at this level it is the safe, all-purpose way to say “but”. It sits between two clauses and governs nothing - the words after it keep whatever case their own sentence gives them:

• أُحِبُّ الشّايَ لٰكِنْ لا أَشْرَبُ القَهْوَةَ.
• البَيْتُ صَغيرٌ لٰكِنِ الحَديقَةُ واسِعَةٌ.

Two notes. The spelling is لٰكِنْ, with the little dagger alif over the ك standing in for a long vowel that is not written as a letter - the dagger alif; *لاكن with a full alif is wrong. And وَلٰكِنْ, with the وَ attached in front, is at least as common as لٰكِنْ alone and means exactly the same thing - treat the two as one item. There is a heavier relative, لٰكِنَّ with a shadda, which forces an accusative on the noun after it; that one belongs with إِنَّ and its sisters in lesson 44, and you do not need it yet.

9. بَلْ - no, rather. بَلْ cancels what was just said and replaces it. Its natural home is right after a negative, where English needs “but rather” or “but instead”:

• ما جاءَ عَلِيٌّ بَلْ خالِدٌ. - Ali did not come; Khalid did. (ما negating a past verb is lesson 37 - here it is only the frame.)
• لَسْتُ طالِبًا بَلْ مُدَرِّسًا. - I am not a student but a teacher.
• لَيْسَ الدَّرْسُ صَعْبًا بَلْ سَهْلًا.

Look at what تَبَعِيَّة does in the last two: لَيْسَ puts its predicate in the accusative (lesson 23), so طالِبًا is مَنْصوب - and مُدَرِّسًا has to be مَنْصوب too. بَلْ after an affirmative sentence upgrades rather than corrects (اِنْتَظَرْتُ ساعَةً بَلْ ساعَتَيْنِ “I waited an hour - no, two”), and in modern prose a sentence-initial بَلْ means “in fact”. Keep the two senses apart: لٰكِنْ contrasts two things that are both true, بَلْ throws the first one away. After a negative both particles are grammatical - ما جاءَ عَلِيٌّ لٰكِنْ خالِدٌ is correct Arabic - but بَلْ is the ordinary modern choice there, so use it.

10. A coordinated pronoun keeps its preposition. This one has no English parallel and is worth memorizing as a shape. An attached pronoun is welded to the word in front of it, so you cannot hang one off a particle. Repeat the preposition instead:

• مَعي وَمَعَكَ - with me and with you. Never *مَعي وَكَ.
• بِهِ وَبِها - with it (m) and with it (f). Never *بِهِ وَها.
• الرِّسالَةُ مِنّي وَإِلَيْكَ.

A related habit: when you add a noun to a subject that is already inside the verb, MSA slips the free pronoun in first as a buffer - ذَهَبْتُ أَنا وَأَخي إِلى المَطارِ, not ذَهَبْتُ وَأَخي. The ـتُ of the verb is too tightly bound to be coordinated with directly, and أَنا gives the وَ something to stand next to.

11. What this lesson leaves alone. لٰكِنَّ with its accusative is lesson 44. The larger connectors that hold a paragraph together - وَلِذٰلِكَ، بِالإِضافَةِ إِلى، مِنْ ناحِيَةٍ أُخْرى - are lesson 66. And there is a وَ that does not join at all but means “while”, opening a background clause; that is الحال, lesson 55.

Forms & patterns

The six particles. Only the first two are written joined:

تَبَعِيَّة - one pair of names, all three cases:

The same with the article, where the ending is a single vowel rather than tanwīn:

One pair of events, three particles, three different meanings:

“Or” in a statement against “or” in a choice question:

A pronoun cannot be coordinated bare - the preposition comes again:

Examples

Common mistakes

• رَأَيْتُ عَلِيًّا وخالِدٌ -> رَأَيْتُ عَلِيًّا وَخالِدًا - the second name shares the job of the first, so it shares its ending. This is the rule of the lesson; everything else is detail.
• جاءَ عَلِيٌّ وَ خالِدٌ -> جاءَ عَلِيٌّ وَخالِدٌ - the وَ is never written with a space after it. It attaches to the next word like بِـ or الـ.
• دَخَلَ فَ جَلَسَ -> دَخَلَ فَجَلَسَ - the same for فَـ. A single-letter word does not stand alone in Arabic writing.
• وَقَعَ الوَلَدُ ثُمَّ صَرَخَ -> وَقَعَ الوَلَدُ فَصَرَخَ - the crying follows the fall instantly and because of it, so the particle is فَـ. ثُمَّ would put a pause in between.
• مَعي وَكَ -> مَعي وَمَعَكَ - an attached pronoun cannot hang off a particle. Repeat the preposition: بِهِ وَبِها، لَهُ وَلَها، مِنْهُ وَمِنْها.
• ذَهَبْتُ وَأَخي -> ذَهَبْتُ أَنا وَأَخي - the subject inside ذَهَبْتُ is a bound ending; put the free pronoun أَنا in first and coordinate onto that.
• هَلْ تُريدُ الشّايَ أَوِ القَهْوَةَ؟ (offering a choice) -> هَلْ تُريدُ الشّايَ أَمِ القَهْوَةَ؟ - when the answer must be one of the two, “or” is أَمْ, not أَوْ.
• اِنْتَظَرْتُ ساعَةً لٰكِنْ ساعَتَيْنِ -> اِنْتَظَرْتُ ساعَةً بَلْ ساعَتَيْنِ - لٰكِنْ joins two single words only after a negative or a prohibition. To correct or raise an affirmative statement the particle is بَلْ.
• لَسْتُ طالِبًا بَلْ مُدَرِّسٌ -> لَسْتُ طالِبًا بَلْ مُدَرِّسًا - بَلْ obeys تَبَعِيَّة like every other joining particle. لَيْسَ made طالِبًا accusative, so مُدَرِّسًا is accusative.
• البَيْتُ صَغيرٌ لاكِنْ جَميلٌ -> البَيْتُ صَغيرٌ لٰكِنْ جَميلٌ - the long vowel in لٰكِنْ is written with the dagger alif over the ك, never with a full alif letter.

Tips

• File وَ and فَـ with بِـ، لِـ، كَـ and سَـ, not with ثُمَّ and لٰكِنْ. They are prefixes, and once you think of them that way the spacing mistake stops happening.
• Use the rhyme test. Two coordinated nouns of the same kind normally rhyme: عَلِيٌّ وَخالِدٌ، عَلِيًّا وَخالِدًا، عَلِيٍّ وَخالِدٍ. If your pair does not rhyme, check the second ending.
• Memory hook for the three “and”s: وَ is a list with no clock, فَـ is the next frame of the film, ثُمَّ is “later that day”.
• English “and then” is usually فَـ, not ثُمَّ. Reach for ثُمَّ only when you could add “after a while” to the English without changing the meaning.
• Do not be shy about repeating وَ in lists. خُبْزًا وَجُبْنًا وَزَيْتونًا is normal Arabic; modern print does also use a bare «،» between the items, but repeating وَ is never wrong.
• Leave لٰكِنَّ alone until lesson 44. لٰكِنْ, and its twin وَلٰكِنْ, will carry every “but” you need through A1 and A2 - and neither one changes any endings.
• When reading unvocalized text, remember that و is both a word and a letter. In وَلَد، وَقَفَ، وَصَلَ it is part of the root. The test: strip it off and see whether what is left is a word.
• Starting a sentence with وَ is good Arabic, not sloppy Arabic. Read a few paragraphs of a news site and count how many sentences open with it - the English rule simply does not apply.