prevent
1.vt.? 阻止；阻碍；阻挠;? 防止；预防；妨碍
记忆：pre 预先+vent 来→预先来到，抢先一步就是防止
2.第三人称单数：prevents 3.现在进行时：preventing
4.过去式：pervented 5.过去分词：prevented
6.短语：
prevent……from ?阻止；防止；妨碍；
例句：prevent? the? disease? from? spreading ?防止疾病的蔓延
prevent sb from doing sth 阻止某人做某事；防止……做某事；
prevent? violence? 防止暴力
prevent? damage 防止伤害；防止损伤
prevent? abuse 防止滥用
prevent? crime 防止犯罪
7.例子：
They?aim?to?prevent?women?from?being?relegated?to?a?secondary?role.他们的目的是防止妇女被置于次要地位。牛津词典 futurestudies?will?investigate?whether?longterm?use?of?thedrugs?could?prevent?cancer未来的研究将深入探究长期服用这些药物是否能（有效）预防癌症。牛津词典The?shelves?have?special?stops?to?prevent?them?from?being?pulled?out?too?far.那些架子有特别的止动器以防被拖出太远。牛津词典Filters?sieve?large?particles?out?of?the?water?to?prevent?them?from?harming?the?pumps.过滤器会将大的颗粒从水中滤出以免它们损伤水泵。