Although transliterated : "YeHoVaH Elohei-nu YeHoVaH Echad" in Hebrew.
The Shema is sung "[Adonai] Eloheinu, [Adonai] Echad" in reverence to HaShem.
YHVH יְהֹוָ֥ה is given the titles : HaShem (The-Name) or אֲדֹנָי Adonai (Lord) in order for Yehudim to not pronounce The Name of God.
This tradition of saying or singing אֲדֹנָי Adonai (Lord) instead of The Name יְהֹוָ֥ה YHVH is associated with the observance of Exodus / Shemot 20:7 stating לֹ֥א תִשָּׂ֛א אֶת־שֵֽׁם־יְהֹוָ֥ה אֱלֹהֶ֖יךָ לַשָּׁ֑וְא כִּ֣י לֹ֤א יְנַקֶּה֙ יְהֹוָ֔ה אֵ֛ת אֲשֶׁר־יִשָּׂ֥א אֶת־שְׁמ֖וֹ לַשָּֽׁוְא You shall not take the name of YHVH your God in vain, for YHVH will not hold blameless anyone who takes His name in vain.
In English, Deuteronomy 6:4 would read : "YHVH [is] our God. YHVH [is] One." In reverence to The-Name, English bibles state : "The LORD our God, The LORD is one."
Deuteronomy 6:4 [NASB]
The Lord is our God, the Lord is one!
Deuteronomy 6:4 [NIV]
The Lord our God, the Lord is one
We see the Shema proclaimed by Yeshua of Nazareth as The Greatest Commandment in Mark 12:29.
Mark 12:29 [ESV]
The Lord our God, the Lord is one.
Mark 12:29 [NASB]
The Lord our God, The Lord is one.
The Shema is a proclamation of faith in our God יְהֹוָ֥ה YHVH.