ask和tell后都可接sb to do,say常做say to或that
在间接引语中：
ask：She asked me,"When do they have their dinner?"→ She asked me when they had their dinner.
tell、say："Don’t make any noise," she said to the children.→She told (ordered) the children not to make any noise.
关键是要看句意,还有在直接引语改间接引语时把握好规律就好了