fall
The leaves fall in autumn. 此句中fall用作动词,意为落下,下降,这是其常用法。fall还有其它用法。如:
①I had a fall and broke my arm. (fall用作名词,意为跌落,掉下,降落。)
②Our holiday plans fell through because of bad weather. (fall through 意为落空,未能实现,成为泡影。)
③My car is falling apart. (fall apart意为破裂,破碎,散架。)
④We fell about (laughing) when we heard the joke. (fall about意为无法控制地大笑。)
⑤Sam, please fall back on old friends in time of need. (fall back on意为求助于,退到。)