我们在长凳上休息了许久之后便慢步向博物馆走去。 After a long rest on the bench we moseyed up to the museum.
他过了许久以后才来。 It was long before he came.
最近，我的一个很好的朋友来看我，她刚从一片森林里散步许久回来，我问她看到了什么。 Recently I was visited by a very good friends who had just returned from a long walk in the woods, and I asked her what she had observed.