1、. be sure 指某人对某事或对某种情况有把握，常译为：“ 确信”；make sure 指“务必、务请、确保”将某事弄清楚。如： I am sure that he is honest.我相信他是诚实的。 I have made sure that he is honest.我已了解清楚他是诚实的。. 二者后面均可接 of 或 about 引出的短语。如： I am sure of success= I am sure that I will succeed.我深信会成功。 Will you make sure of his return?= Will you make sure that
2、 he returned?请你查明他是否真的回来了。好吗？. make sure 后面的 that 从句一般不用或很少用将来时；be sure 后面的 that 从句则可用将来时。如： Make sure that you come here before five.你一定要在 5 点前来。 I am sure that he will come.我相信他一定会来的。. 两者后面接不定式，均表示“一定要做某事” ，但 make sure 通常只用于祈使句；而 be sure 则不受限制。如： Make sure to come to party on time.一定要准时来参加晚会。 He is sure to call you up.他准会给你打电话的。
