这两个词都可以作副词,但意义和用法不同。
almost = very nearly。指在程度上相差很少,almost可与no,none,nothing,never,nobody等表示否定意义的词连用。如:
I almost missed the flight. 我差一点误了航班。
Almost no one believed what he said. 几乎没人相信他的话。
mostly=mainly“大部分”“主要地”“通常地”。如:
The students in our class are mostly from the factory. 我们班的学生主要来自这家工厂。
His stories were mostly about his travels in foreign countries.
他的故事大多是关于他在国外旅游的经历。