[译] 老师走进教室时,学生们都停止了说话。
[误] When the teacher came into the classroom, the students stopped to talk.

[正] When the teacher came into the classroom, the students stopped talking.
[注] stop后可以跟动词不定式,也可以跟动名词,但表示的意义不同。stop to do sth. 表示“停下(原来所做的事情)去做某事”,而 stop doing sth. 表示“停止做某事”。