突然的移动让他猝不及防，向前跌倒。

The movement took him by surprise, and he pitched forward.

《柯林斯英汉双解大词典》

她大叫一声向前跌倒了。

With a cry she pitched forward.

《牛津词典》

他向前跌倒在结冰的马路上。

He fell off the road.

youdao

当我向前迈步的时候我发现我所走的距离是在地球上的两倍，我跌倒了。

I found I was carried twice as far as on the earth and fell over.

youdao

当我向前迈步的时候我发现我所走的距离是在地球上的两倍，我跌倒了。

I found I was carried twice as far as on the earth and fell over.

youdao