prevent后一定要加from吗如预防感冒,是prevent colds还是prevent from catching colds?还是两个都对?

prevent后一定要加from吗如预防感冒,是prevent colds还是prevent from catching colds?还是两个都对?
prevent后一定要加from吗
如预防感冒,是prevent colds还是prevent from catching colds?还是两个都对?

prevent后一定要加from吗如预防感冒,是prevent colds还是prevent from catching colds?还是两个都对?
都可以.prevent既是及物动词也是不及物动词.

prevent doing sth 阻止某事发生
prevent sb from doing sth 阻止某人做某事
prevent from 从某事中阻止

三个“阻止某人干某事”
prevent sb (from)doing sth
stop sb (from) doing sth
keep sb from doing sth
注意：区别keep sb doing sth.