1
אתם נצבים. מְלַמֵּד שֶׁכִּנְּסָם מֹשֶׁה לִפְנֵי הַקָּבָּ"ה בְּיוֹם מוֹתוֹ לְהַכְנִיסָם בַּבְּרִית: אתם נצבים YE ARE STANDING THIS DAY [ALL OF YOU BEFORE THE LORD] — This teaches that Moses assembled them in the presence of the Omnipresent on the day of his death, in order to initiate them into a covenant with Him.
2
ראשיכם שבטיכם. רָאשֵׁיכֶם לְשִׁבְטֵיכֶם: ראשיכם שבטיכם means as much as ראשיכם לשבטיכם YOUR HEADS OF YOUR TRIBES.
3
זקניכם ושטריכם. הֶחָשׁוּב חָשׁוּב קוֹדֵם, וְאַחַר כָּךְ כל איש ישראל: זקניכם ושטריכם YOUR ELDERS AND YOUR OFFICERS — The more prominent were in front (i.e. they stood before the Lord in the order of their rank), and afterwards: “all the men of Israel”.