1)
It is written va'Tagev, and we pronounce it va'Tagvah!
1.
Radak: The Hei is extra.
2)
Why does it say "l'Mar'e Eineha"?
1.
Rashi: [She desired them] because she saw their appearance.
2.
Malbim: She desired to see them.
3)
Why did they send messengers?
1.
Radak: It was so [Kasdim] would be frequent among Yehudah ? and so they did.
2.
Malbim: They strove to make a Bris with them.