prevent的固定搭配：prevent sb/sth from doing sth，意为阻止/阻碍某人/某事。prevent作为及物动词，意为“阻止”、“阻碍”、“阻挠”，后接名词、代词或动名词作宾语，不接不定式作宾语。
一、prevent的中文释义及用法介绍
prevent作为动词，意为阻止;阻碍;阻挠。
例句：The accident could have been prevented.
这次事故本来是可以防止的。
They took active steps to prevent the spread of the disease.
他们采取积极措施，防止疾病蔓延。
Nothing would prevent him from speaking out against injustice.
什么都不能阻止他鸣不平。
He said this would prevent companies from creating new jobs...
他说这将使公司无法创造新的工作机会。
A back injury prevented active participation in any sports for a while.
背伤曾一度妨碍积极参加任何体育运动。
The floor is sealed to prevent water penetration.
地板加了密封涂料防止渗水。
二、关于prevent的固定搭配
prevent作为动词，后面可直接接名词，再接介词from，后跟宾语，即prevent sb/sth from doing sth，其中from可省略。
例句：Nothing can prevent us from carrying out the plan.
什么也无法阻挡我们去实施这个计划。
Ways must be found to prevent the poisonous gases from polluting the air.
一定要找到办法防止有毒气体污染空气。
Nothing would prevent him/his speaking out against injustice.
什么也阻挡不了他为不平之事鸣冤叫屈。
