prevent后一定要加from吗

prevent后一定要加from吗 prevent from中from是介词吗?后面加什么成分? prevent from from 可以省略吗 prevent from prevent..from... from 的后面接doing吗? prevent sb from doing的from可以省略吗 be动词后一定要加形容词吗 及物动词后一定要加宾语吗? prevent us from doing prevent from being prevent from怎么用? prevent ...from...和protect...