Continue to hold depended(spousal) work permit after getting H4

[onlineshan]

I'm in Canada on closed work permit, and my spouse is on dependent open work permit(not working). For both, Permit/Visa expiry date is in 6 months time. But now I got a job in usa and going there shortly.

1.Can my spouse continue staying in Canada after I leave for few months ?
2.Can my spouse get h4 stamping (along with me) and comeback to Canada and stay by herself or stay with her friends/brother for 2 or 3 months. ?

Thanks for the reply.