-Yes.
这段时间算合法身份吗?
-Yes, as long as your I-485 is pending.
还是应该马上转H-4,
-If you change your status to H4, your I-485 probably will be denied. You had better find a job in the same/similar area and use EAD or H1 transfer to work.
转了H-4是不是EAD就失效了?
-Irrelevant.