stop doing sth 和stop to do sth.
stop doing sth是“停止做某事”,doing是stop 的宾语,是要停止的动作,
stop to do sth 是“停下来开始做某事”,to do是stop的状语,表示目的,是要开始做的事情,例如:
1、The two girls stopped talking when they saw me.
那两个女孩一见到我就停止了讲话。
2、The two girls stopped to talk to me when they saw me.
这两个女孩一看到我就停下来和我讲我。