Why did it say that it will be a Ru'ach Sheker?
Refer to Melachim I, 22:22:1:1.
Why did it say "b'Fi Kol Nevi'av"?
'Rashi': This teaches that they were true Nevi'im; they would say only what Hashem put in their mouths 1 .
Perhaps 'Rashi' infers this, for false Nevi'im normally flatter the king and would predict success for him on their own. The other Meforshim hold that they were false Nevi'im. (PF)
Why did He say "Tefateh v'Gam Tuchal"?
'Rashi': Sometimes one entices, and the listener understands that he entices, and he is careful and does not heed his words. You will entice Achav and succeed!
Why did Hashem say "leave" (and not 'go')?
Refer to Melachim I, 22:22:4:1.
