يكون is/being in Arabic

أنه لما كان بابُ المناظرة في الرد والقبول مُتَّسِعًا، وكل واحدٍ من المتناظرين في الاستدلال والجواب يرسل عِنانه في الاحتجاج، ومنه ما يكون صوابًا ومنه ما يكون خطأً،

that since the field of debate in rejection and acceptance was wide, and each debater in reasoning and answering would let loose his reins in argumentation, some of it being correct and some incorrect,

يَكُونُ it is being

Present 'is, turns out', subject 'it' inside — 'what proves to be...'.

From Rules of Scholarly Debate

أنه لما كان بابُ المناظرة في الرد والقبول مُتَّسِعًا، وكل واحدٍ من المتناظرين في الاستدلال والجواب يرسل عِنانه في الاحتجاج، ومنه ما يكون صوابًا ومنه ما يكون خطأً،

that since the field of debate in rejection and acceptance was wide, and each debater in reasoning and answering would let loose his reins in argumentation, some of it being correct and some incorrect,

يَكُونُ it is being

Present 'is, turns out', subject 'it' inside.

From Rules of Scholarly Debate

وكيف يكون حال المستدل والمجيب، وحيث يسوغ له أن يكون مستدلًّا، وكيف يكون مخصومًا منقطعًا،

and how the condition of the reasoner and respondent should be, when it is permissible for them to be reasoning, and how one becomes refuted and silenced,

يَكُونُ it should be

Present 'should be', subject 'the state' next; 'kana' taking a predicate.

From Rules of Scholarly Debate

وكيف يكون حال المستدل والمجيب، وحيث يسوغ له أن يكون مستدلًّا، وكيف يكون مخصومًا منقطعًا،

and how the condition of the reasoner and respondent should be, when it is permissible for them to be reasoning, and how one becomes refuted and silenced,

يَكُونَ to be

'be', subjunctive (the -a) after 'an'; 'kana' taking a predicate; subject 'he' inside.

From Rules of Scholarly Debate

وكيف يكون حال المستدل والمجيب، وحيث يسوغ له أن يكون مستدلًّا، وكيف يكون مخصومًا منقطعًا،

and how the condition of the reasoner and respondent should be, when it is permissible for them to be reasoning, and how one becomes refuted and silenced,

يَكُونُ one becomes

Present 'becomes', subject 'one' inside; 'kana' taking a predicate.

From Rules of Scholarly Debate

ولا يلزم من ذلك أن يكون هو فاعل الدفق

And it is not required that he be the performer of the pouring.

يَكُونَ he be

A 'to be' verb pushed into the subjunctive shape by the 'that' before it: 'that he be'. After this particle Arabic changes the verb's ending to mark a contemplated state rather than a fact; it links the upcoming subject and predicate.

From Creating Life from Nothing

فَمَنْ أَنْكَرَ أَنْ يَكُونَ اللَّهُ قَدْ تَكَلَّمَ بِالْقُرْآنِ فَقَدْ أَنْكَرَ حَقِيقَةَ الرِّسَالَةِ

So whoever denies that God has spoken the Quran has indeed denied the reality of the message.

يَكُونَ God has

The verb here sits in its subjunctive shape, and the trigger is the particle an just before it. After an, Arabic drops the plain present ending and switches to this subordinate form, which is how a listener hears that what follows is a reported possibility being weighed, not a free-standing statement of fact.

From Proofs of Scripture

فَهَذَا بَين أَن المذنب بِالشرابِ وَغَيره قد يكون محبا لله وَرَسُوله

This shows that a sinner through drinking and otherwise can still love Allah and His Messenger.

يَكُونُ he is

This is a present-tense verb of being with a built-in 'he' subject, the verb Arabic uses to say someone 'is/becomes' a thing. Under the 'may' particle it carries 'he may be', leading to the description that follows.

From Sincerity and Hypocrisy

كَمَا أَن العابد الزَّاهِد قد يكون لما فِي قلبه من بِدعَة ونفاق مسخوطا عِنْد الله وَرَسُوله

Just as a devout worshipper may, because of the innovation and hypocrisy in his heart, be disliked by Allah and His Messenger.

يَكُونُ he is

This is a present-tense verb of being with a built-in 'he' subject, the verb for 'is/becomes' a state. Under the 'may' particle it carries 'he may be', leading to the description at the sentence's end.

From Sincerity and Hypocrisy