倒的过去式和原形 摔

fall，摔倒，跌倒

过去式:fell，过去分词:fallen

fαll过去式是:fell

v.

落下，跌倒（fall的过去式）砍伐，打倒

例句:

More than 100 trees were felled in just over an hour.短短一个多小时里超过100棵树被砍倒。

The goalkeeper was felled by a coin thrown from the crowd.守门员被人群中扔出的一枚硬币击倒

他扶住椅子后背，以免摔倒。He held onto the back of the chair to stop himself from falling

在英语词汇中摔倒的过去式和原形分别是fall down， fell down 

“摔倒在地上”用fall on/onto the ground. 表达，或者只用fall over(摔倒)，不加地点。 fall over(sb./sth)是被绊倒的意思。 fall over yourself to do 则是不遗余力去做某事

例句：

The sky won't fall down.天不会塌下来。You almost fall down， but not really.你差点儿跌倒，但是并没有跌倒