阻止或防止某人做某事
「prevent from」的用法主要是阻止或防止某人做某事。例如,"prevent you from doing your homework"意味著阻止你做作業。
在主動語態中,可以省略「from」,但在被動語態中則不能。例如,"The law was passed to prevent the pollution of rivers and lakes"(法律被通過以防止河流和湖泊受到污染)和"The measures were taken to prevent the spread of the disease"(採取了措施以防止疾病的傳播)。