What is "Vehayah ... " referring to?
Rashi: It is referring to "li'Metar ha'Shamayim Tishteh Mayim (in Pasuk 11). 1
Why does the Torah use the double Lashon "Shamo'a Tishm'u"?
Rashi and Rashbam (citing B'rachos, 40a): 'If you will listen to the old (you will revise what you have already learned 1 ), you will listen to the new - (you will learn new things from the old ones). 2
Why does it insert the word "ha'Yom"?
Rashi: The words of Torah should always be new to you, as if you had just heard them that day. 1
What are the implications of "le'Ahavah es Hashem Elokeichem"?
Rashi: 'One should not say "I will learn Torah (or keep Mitzvos) in order to acquire wealth, to become a Rav or to earn a livelihood - rather all that you do you should do out of love (of Hashem) and the reward will come later.
What are the connotations of "Le'avdo be'Chol Levavchem"?
Rashi: Avodah with the heart refers to Tefilah. 1
Having already issued the command "be'Chol Levav'cha u've'Chol Nafsh'cha" (in Devarim, 6:5), why does it repeat it here?
Rashi and Ramban (citing the Sifri): The Pasuk in Va'eschanan is referring to individuals, whereas the Pasuk here is referring to the Tzibur, 1 (when the majority of them are Tzedakim or Resha'im 2 - Ramban).
Which explains why the Pasuk here omits "be'Chol Me'odecha". See Sifsei Chachamim. Ramban: On whose behalf Hashem performs miracles - to send the rain in its right time and to make an abundance of grass grow for the animals, or to shut down the heavens so that no rain should fall, whereas the individual lives on his merits and dies for his sins.
Ramban: But if they are only Beinonim, He does good or bad to them, depending upon their deeds, without miracles, based entirely on the laws of nature.