英语中的助词包括be动词（如am, is, are等）、情态动词（如can, could等）、副词（如not, never等）、介词（如in, on等）和连词（如and, or等）。这些词在英语中非常常见，对于正确理解和使用英语语法非常重要。
- be 动词：am, is, are, was, were, been, being
- 情态动词：can, could, may, might, shall, should, will, would, must
- 副词：not, never, always, often, usually, sometimes, already, just, still, yet, ever, only, even, also, again
- 介词：in, on, at, to, from, with, by, for, of, about, over, under, above, below, through, across, after, before, between, among
- 连词：and, or, but, so, yet, nor
