Stop sb.from ...三者区别.

stop 即是停止的意思.例如,在红灯前将车停下来,就叫做：stop the car before traffic light turns red.
prevent 即是防止的意思.例如,to prevent accidents from happening,public should be more cautious of their own safety.
protect 即是保护的意思.例如,women should protect themselves from family violence by voicing out through newspapers.