回复：几点个人看法：

Fist, how about someone, in her H4 extension petition, told USCIS, "hay, I used EAD for xxxxx from x time to y time" and still did get full I-797?

Second, USCIS almost has never affirnatively requested documents from IRS to check a person's employment history. It has many many other ways to do so. For example, in light of the person's EAD application history, USCIS can simplely issue an RFE for him to state his actual employment history. If he did use EAD and it does afftect H4 status now, can he lie to USCIS? Giving him a EAD and not caring whether he use it or not in approving the H4, does'nt this mean that USCIS allows co-existing for H4 status and using EAD?

你H1在Nov.2007得到批准而不需离境是很偶然的运气，因为你在2007年开始时始用的EAD要到08年报税后才能体现出来.