1
prevent + noun/pronoun
直接接名词或名词短语，表示防止某事发生。
Regular exercise can prevent many diseases.
定期锻炼可以预防许多疾病。
阻止；防止；预防
prevents — third person singular of prevent
先理解核心含义，再看它在真实句子里的用法。
阻止；防止；预防
To stop something from happening or to keep someone from doing something.
Regular exercise can prevent many diseases.
定期锻炼可以预防许多疾病。
阻止；防止；避免。
To stop (an outcome); to keep from (doing something).
prevent
Base
原形
prevents
3rd person
第三人称单数
preventing
-ing
现在分词
prevented
Past
过去式
prevented
Past participle
过去分词
She prevents accidents by being careful.
她通过小心谨慎来防止事故发生。
They prevented the fire from spreading.
他们阻止了火势蔓延。
He is preventing the problem from getting worse.
他正在阻止问题恶化。
动词形式规则变化
Washing your hands regularly helps prevent the spread of germs.
经常洗手有助于防止细菌传播。
The lock on the gate prevented anyone from entering the yard.
大门上的锁阻止了任何人进入院子。
A healthy diet and exercise can prevent many diseases.
健康的饮食和锻炼可以预防许多疾病。
直接接名词或名词短语，表示防止某事发生。
Regular exercise can prevent many diseases.
定期锻炼可以预防许多疾病。
常用结构，表示阻止某人做某事。
The rain prevented us from going out.
下雨阻止了我们外出。
from 可省略，尤其在美式英语中。
The quick action prevented the fire (from) spreading.
迅速的行动阻止了火势蔓延。
Not this
The medicine prevented him catching the disease.
Use this
The medicine prevented him from catching the disease.
动词 prevent 后接宾语时，必须使用固定搭配 prevent sb/sth from doing sth，不可省略介词 from。
Not this
We should prevent the accident to happen.
Use this
We should prevent the accident from happening.
prevent 后不能接不定式 to do，而应接 from doing 结构来表达阻止某事发生。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
预防事故
Wearing a seatbelt can prevent accidents.
系安全带可以预防事故。
预防疾病
Vaccination helps prevent disease.
接种疫苗有助于预防疾病。
防止冲突
Dialogue can prevent conflict between nations.
对话可以防止国家间的冲突。
防止灾难
Early warning systems prevent disaster.
早期预警系统可以防止灾害。
防止进一步损害
We must act quickly to prevent further damage.
我们必须迅速行动以防止进一步损害。
阻止某人做某事
The lock prevented the thief from entering.
锁阻止了小偷进入。
当场阻止
The quick response prevented the fire in its tracks.
迅速的反应当场阻止了火灾。
阻止不可避免的事
Despite his efforts, he couldn't prevent the inevitable.
尽管他努力了，还是无法阻止不可避免的事。
防止再次发生
We must take measures to prevent a recurrence of the error.
我们必须采取措施防止错误再次发生。
Use prevents naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
pre-提前，vent-风来，提前挡风即阻止。
register: neutral; contexts: 日常对话, 正式写作, 技术说明; note_zh: 通常用于中性或正式场合，适用范围较广。
Words ending in 'vent' share the spelling and generally have the /ɛnt/ sound, but note that 'advent' has primary stress on the first syllable, while 'prevent', 'invent', and 'event' stress the second syllable.
Dictionary facts from ECDICT, WIKTIONARY.