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Because and so כִּי, בִּגְלַל, לָכֵן

Cause and result are split by what follows the linker: כִּי and מִפְּנֵי שֶׁ take a clause, בִּגְלַל takes a noun, and לָכֵן or spoken אָז introduce the result. Purpose uses כְּדֵי plus an infinitive, which is not a cause.

The rule

State a reason with כִּי plus a clause or בִּגְלַל plus a noun; state a result with לָכֵן; state a purpose with כְּדֵי plus an infinitive.

Because: clause versus noun

כִּי is the default spoken “because” before a full clause: אֲנִי נִשְׁאָר כִּי אֲנִי עָיֵף. בִּגְלַל takes a noun phrase: בִּגְלַל הַגֶּשֶׁם. מִפְּנֵי שֶׁ and מִכֵּיוָן שֶׁ are more formal clause linkers with the same job as כי. Do not put a finite clause straight after בגלל in careful style.

HebrewTransliterationEnglish
אֲנִי נִשְׁאָר כִּי אֲנִי עָיֵףani nish'ar ki ani ayefI am staying because I am tired
בִּגְלַל הַגֶּשֶׁם לֹא יָצָאנוּbiglal hageshem lo yatzanuBecause of the rain we did not go out
מִפְּנֵי שֶׁאֵין זְמַןmipnei she'ein zmanbecause there is no time
Cause, result, purpose
LinkerFollowed byExample
כִּיa clauseכִּי יֵשׁ עֲבוֹדָה
בִּגְלַלa nounבִּגְלַל הָעֲבוֹדָה
מִפְּנֵי שֶׁa clauseמִפְּנֵי שֶׁיֵּשׁ עֲבוֹדָה
לָכֵןa result clauseלָכֵן לֹא בָּאתִי
כְּדֵיan infinitiveכְּדֵי לִרְאוֹת
So and therefore

לָכֵן is a clear “therefore” at the start of the result: יָרַד גֶּשֶׁם, לָכֵן נִשְׁאַרְנוּ. Spoken Israeli Hebrew also uses אָז for a light “so.” עַל כֵּן and מִשּׁוּם כָּךְ belong to a more written register. Keep the reason and the result as two clauses; do not glue them with כי and לכן in the same slot.

HebrewTransliterationEnglish
אֵין אוֹטוֹבּוּס, לָכֵן אֲנִי הוֹלֵךְ בָּרֶגֶלein otobus, lakhen ani holekh baregelThere is no bus, so I am walking
אָז בּוֹא נֵלֵךְaz bo nelekhSo let’s go
Purpose is not cause

כְּדֵי plus an infinitive means “in order to”: בָּאתִי כְּדֵי לִרְאוֹת אוֹתְךָ. כְּדֵי שֶׁ plus a future-like clause is used when the subjects differ: כְּדֵי שֶׁתָּבִין. That is purpose, not “because.” English “so” covers both; Hebrew splits them.

HebrewTransliterationEnglish
אֲנִי לוֹמֵד כְּדֵי לַעֲבוֹד פֹּהani lomed kedei la'avod poI am studying in order to work here
דַּבֵּר לְאַט כְּדֵי שֶׁנָּבִיןdaber le'at kedei shenavinSpeak slowly so that we understand

Exceptions

Spoken biglal she

Many speakers say בִּגְלַל שֶׁ plus a clause. You will hear it constantly. Careful teaching still pairs בגלל with a noun and כי / מפני ש with a clause, and that pairing is what written Israeli Hebrew prefers.

בִּגְלַל שֶׁהָיָה לִי חַםbiglal shehayah li khambecause I was hot (spoken)

Ki is not a complementizer here

In this lesson כִּי means “because.” Biblical and high-literary כי can mean “that,” but modern Israeli complements after “say” and “think” use שֶׁ. Do not write אֲנִי חוֹשֵׁב כִּי for “I think that” in everyday style.

Common mistakes

בִּגְלַל אֲנִי עָיֵףכִּי אֲנִי עָיֵף

בִּגְלַל needs a noun; a clause takes כִּי.

בָּאתִי כִּי לִרְאוֹת אוֹתְךָבָּאתִי כְּדֵי לִרְאוֹת אוֹתְךָ

Purpose with an infinitive is כְּדֵי, not כִּי.

לָכֵן אֲנִי עָיֵף as the reasonכִּי אֲנִי עָיֵף

לָכֵן introduces a result, not a cause.

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