make sure 和be sure的区别要详细、全面、具体.而且要明显

make sure 一般用在句首,前面没有主语，表确定，证实；而be sure 前有主语，一般为sb. be sure to do sth./of sth./that 希望对你有帮助

make sure 确保,确定 Make sure that you have finished all the work.
确保你完成了所有工作.
be sure 肯定,一定 He is sure to come here tonight.他今晚一定会来这里.