根据副词在句子中所起的作用，我们可以把副词分为：

1. 时间副词，如：ago, ahead, before, behind, beside, below, soon, now, recently, sometime, today, tomorrow, tonight, then, yesterday等；此外，还有表示频度的副词，如：always, constantly, ever, frequently, hardly, never, occasionally, often, rarely, seldom, sometimes, twice, usually等。

2. 地点副词，如：above, abroad, down, downstairs, everywhere, here, home, in, inside, out, outdoors, there, up, upstairs等。

3. 疑问副词，如：how, when, where, why 等。

4. 方式副词，如：angrily, badly, bravely, calmly, carefully, easily, fast, happily, hurriedly, loud, loudly, quickly, quietly, rapidly, slowly, slightly, suddenly, well 等。

5. 程度副词，如：a little, almost, completely, deeply, enough, extremely, fairly, fine and, good and, greatly, hardly, just, much, nearly, partly, pretty, quite, rather, so, terribly, too, very, very much 等。

6. 关系副词，如：when, where, why 等。

7. 连接副词，如：if, how, however, nor, so, therefore, too, when, whenever, where, wherever, whether, why 等。

8. 句子副词，如：fortunately, frankly, generally, luckily, maybe, obvious, officially, perhaps, possibly, probably unfortunately 等。

9. 关联副词，如：besides, furthermore, however, moreover, never the less, so, then, thus, therefore 等。