How to say to collapse/to topple over in Chinese 倒下

前边的人倒下了，后边的人跟上去。 ( The person in front fell down, and the person behind kept up. )

已经是春暖花开，倒下起大雪来了。 ( Spring is already blooming and heavy snow is falling. )

身子一歪倒下了 ( My body fell down )

宁可倒下去，也不屈膝投降 ( Better to fall down than surrender )