v.i.不及物動詞減少The demand for workers is falling as machines take over the industry
v.i.不及物動詞落下The boy is falling off the ladder
v.i.不及物動詞下跌I keep falling because of the icy street
v.i.不及物動詞倒塌中The old building is falling apart.
v.i.不及物動詞落後中He is falling behind in his studies.
v.i.不及物動詞陷入She is falling in love with him.
n.名詞秋天Falling leaves are a sign of autumn.
n.名詞落下The falling of the Berlin Wall was a historic event.
adj.形容詞下降的The falling price of oil is affecting the economy.