What is the meaning of "Tishacheis ha'Aretz"?
Targum Onkelos: It means that the inhabitants of the land were destroyed.
Why did Pharaoh's Chachamim not try to replicate Arov?
Riva (to 7:11): Because Pharaoh did not call them, since he already saw from the plague of lice that the magicians could not copy Moshe.
Moshav Zekenim (to 8:12): The magicians saw from the lice that it was all from Hashem, and their actions would not help; it would be a waste of effort.
QUESTIONS ON RASHI
Rashi writes: "'Tishacheis ha'Aretz' - The land was destroyed (as per Targum)." What difficulty does Rashi need to clarify?
Gur Aryeh: Although the verb "Tishacheis" seems to be in future tense; Targum makes it clear that it is in past tense. Also, our Pasuk relates what happened; so it opens with the past-tense verb "va'Ya'as" - "Hashem did so."
