fall常用作动词，表示的含义有：跌倒,倒下；掉下,落下；表示气温,价格的"下降"等。
(1)跌倒,倒下。如：
Danny fell in the snow. 丹妮摔倒在雪地里。
(2)掉下,落下。如：
An apple fell from the tree. 一个苹果从树上掉了下来。
The glass fell on the ground. 杯子掉在了地上。
(3)表示气温,价格的"下降"。如：
The temperature has suddenly fallen. 温度突然下降。
(4)fall还可用作连系动词,意为"变得",后常接形容词asleep, ill等。如：
She fell ill as soon as she got to London. 她一到伦敦就生病了。
He was just falling asleep when there was a knock at the door. 他刚要入睡,就有人敲门。
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