熟记英语300句 中考英语无忧虑
—人教版初中英语高频考点、句型讲练（091）
主题句：Nothing can prevent us from joining the Party.
没有什么能阻止我入党。
考点: 动词prevent的用法
1. prevent 意为"阻止；阻挠"，可以直接带宾语，表示"阻止、防止某事某物"，和stop 用法相近。
What can we do to prevent illness and keep healthy?
我们能做什么来预防疾病保持身体健康呢?
Most people had to stay at home in order to prevent the spread of COVID-19.
大部分人不得不呆在家里来防止新冠病毒的传播。
The local government has done a lot to prevent environmental pollution.
当地政府已经采取很多措施来防止环境污染。
2. prevent sb. from doing sth. 意为"阻止某人做某事"，在主动语态中介词from 可以省略，即prevent sb doing sth. ，在被动语态中from不能省略。
Trees can prevent the water from washing the earth away.
树木能够阻止水把泥土冲走。
Something must be done to prevent people from killing the wild animals.
必须采取措施阻止人们*害野生动物。
Those children were prevented from playing in the busy street.
那些孩子被阻止在繁忙的大街上玩耍。
3. prevent sb. from doing sth. 的同义词组有stop sb. from doing sth. 和 keep sb. from doing sth.
You should prevent /stop / keep him from smoking here.
你应该阻止他在这里吸烟
He prevented / stopped / kept the boy from climbing the tree.
他阻止那个男孩子爬树。
注意：prevent sb. from doing sth. 和 stop sb. from doing sth. 中介词from可省略，但 keep sb. from doing sth. 中from不能省略。keep sb. doing sth. 意为"使某人持续做某事"。
Why do you keep me waiting so long?
你为什么让我等了这么久？
小试牛刀：
1. Be more careful and we can these accidents.
A. make B. take C. prevent D. cause
2. Why not them cutting trees?
A. let B. prevent C. keep D. ask
3. Who did you see ______ him _____ in the river?
A. prevent, to swim B. to prevent, from swimming
C. prevent, from swimming D. to prevent, to swim.
4. Doctors ask him not to smoke.
Doctors the man .
5. 这些交通规则能够阻止事故发生。
These traffic rules can prevent accidents .
