如题所述
①stop/keep/prevent…from…意思是“阻止……去做……”,动词所接的宾语是要被阻止的对象。而protect…from…中,动词所接的宾语是要被保护的对象。②被动用法相同。stop/prevent…from…中使用主动语态时,可省略介词from,而词组keep…from…中的from不可省略。但在被动语态中from均不可省略。例如:He tried his best to stop/prevent her (from)going to the south ,but he failed.他尽力地去劝阻她去南方,但是他失败了。[stop/prevent sb. (from) doing sth.]In order to keep her from going out, he locked the door.为了阻止她外出,他把门锁上了。(keep sb. from doing sth. from不可省略)
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