他没有阻止事故的发生 He didn't prevent the accident from happening 可以吗

他不知道如何处理这起交通事故.he didn't know ()()()()the accident prevent sth. from happening 什么意思? ___ to prevent sth bad from happening prevent sb from doing的from可以省略吗 he didn't know what was happening outside 为什么用的是was happenin prevent from from 可以省略吗 He didn't know what was happening outside,为什么happening是进行时? Luckily,the boy didn't hurt his( )in the accident ,so he can 阻止惩罚应该用prevent penalty 还是prevent from penalty 如何用keep/stop/prevent sb from doing sth 来表示“他阻止她砍树" Luckily,he didn't hurt badly in the accident（改错） George was responsible for the accident because he didn’t gi