8老师您好，
我现在的情况是“H1B is anticipated on August 1". 这是不是意味着我的H1B是这天才生效。在八月一号以前，我的身份还是F1？
-Yes.
我先申请了OPT。 这也意味着我先生持F2签证必须在八月一号之前离境。
He can file change of status from F-2 to H-4 during your H-1B pending or before your H-1B is effective. Thus, he can stay in US legally.
