here/hereby

here /hiə/ adv. 1. 这儿：Come here. 到这里来。It was here that the hero lay down his life. 英雄就是在这儿牺牲的。2. 这时，在这一点上：Here the speaker paused.这时讲话人停了一下。 3. (用于引起注意)： Here, let me try it.哎，让我试试。here and there 到处，处处：The balloons were hung here and there.到处挂着气球。here and now 现在马上：Let’s start the experiment here and now. 我们马上开始做实验。［注］here 位于句首，如果主语为一名词，则主谓倒装；如为人称代词，则不倒装：Here comes the bus!公共汽车来了! Here she comes. 她来了。 

hereby /ˈhiəˈbai/ adv.以此方式，特此：I hereby acknowledge receipt of your letter of 25July.特此告知贵方7月25日的来函收悉。Notice is hereby given that...特此布告…I hereby resign my office.特此辞职。