58问答库 > stop......from(doing) sth=prevent......from(doing) sth=keep......from(doing) sth

stop......from(doing) sth=prevent......from(doing) sth=keep......from(doing) sth

2024-11-19 14:36:14

推荐回答（4个）

回答（1）：

因为 stop sb. (from) doing sth 和 prevent sb (from) doing sth 省掉了from 不会影响语义，而 keep sb. from doing sth 省掉from后，意思正好相反：
I kept him working on his homework —— 我一直让他做作业
I kept him from working on his homework —— 我不让他做作业

回答（2）：

keep后面from省略后就变成另外一个意思，只有在keep from doing sth 时才有阻止做某事的意思，而keep doing sth 就是一直做某事的意思，所以keep后面from不可省略。

回答（3）：

因为如果keep sb from doing sth......省掉之后变成keep sb doing sth意思变为“使某人一直做某事”。所以不能省

回答（4）：

keep doing 表示一直在做，加了from 才能表示prevent的意思