如题所述
stop sb. from doing （此处from可以省略）意为：阻止某人做某事。
同意词组有：
keep sb. from doing（from不能省略，否则意思变为使某人一直做某事。）
prevent sb. from doing（可以省略，意思不变）
例句：Nothing can stop me from learning English .
The leaves on the ground can prevent the soil from being running away.
参考http://dict.youdao.com/search?q=%E9%98%BB%E6%AD%A2%E6%9F%90%E4%BA%BA%E5%81%9A%E6%9F%90%E4%BA%8B&keyfrom=hao360