如题所述
1. be sure of/about + 名词,代词,动名词 意为确信,对…有把握
表示对客观事物有肯定的认识和判断,主语必须是人.
e.g. As Jordan joined our team, we are sure of winning the game this time.
2. be sure to … 一定,肯定
后接不定式往往表示局外人的推测,评论,主语不一定是人.
e.g. It's sure to rain tomorrow.
比较：
a. He is sure to live to ninety. 他肯定可以活到九十岁.
b. He is sure of living to ninety. 他自信可以活到九十岁.
当be sure to 用于祈使句时，表"务必,切望"解.
be sure 接that从句时,意为：认为…一定会,主语必须是人,连词that可以省略,be sure 后面还可以接由whether, where, when 或 who 等引导的名词性从句,这时,主句通常是否定形式.
E.g.
我不能肯定今晚是否有空. I am not sure whether I will be free or not tonight.
表示对客观事物有肯定的认识和判断,主语必须是人.
e.g. As Jordan joined our team, we are sure of winning the game this time.
2. be sure to … 一定,肯定
后接不定式往往表示局外人的推测,评论,主语不一定是人.
e.g. It's sure to rain tomorrow.
比较：
a. He is sure to live to ninety. 他肯定可以活到九十岁.
b. He is sure of living to ninety. 他自信可以活到九十岁.
当be sure to 用于祈使句时，表"务必,切望"解.
be sure 接that从句时,意为：认为…一定会,主语必须是人,连词that可以省略,be sure 后面还可以接由whether, where, when 或 who 等引导的名词性从句,这时,主句通常是否定形式.
E.g.
我不能肯定今晚是否有空. I am not sure whether I will be free or not tonight.
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第1个回答 推荐于2018-08-01
"be sure to do"和"be sure of”有什么区别
答：be sure of 与be sure to do的区别：
be sure of 和be sure that一样，主语是人， 主语感到“有把握；确信”； be sure to do的主语可以是人，也可以是物， 表示说话人推测“一定；必然会”。例如：
He is sure of his success. /He is sure that he will succeed. 他确信他会成功。
He is sure to succeed. 他一定会成功。(说话人的看法)本回答被提问者和网友采纳
答：be sure of 与be sure to do的区别：
be sure of 和be sure that一样，主语是人， 主语感到“有把握；确信”； be sure to do的主语可以是人，也可以是物， 表示说话人推测“一定；必然会”。例如：
He is sure of his success. /He is sure that he will succeed. 他确信他会成功。
He is sure to succeed. 他一定会成功。(说话人的看法)本回答被提问者和网友采纳
第2个回答 2019-06-23
"be sure to do"和"be sure of”有什么区别
答：be sure of 与be sure to do的区别：
be sure of 和be sure that一样，主语是人， 主语感到“有把握；确信”； be sure to do的主语可以是人，也可以是物， 表示说话人推测“一定；必然会”。例如：
He is sure of his success. /He is sure that he will succeed. 他确信他会成功。
He is sure to succeed. 他一定会成功。(说话人的看法
答：be sure of 与be sure to do的区别：
be sure of 和be sure that一样，主语是人， 主语感到“有把握；确信”； be sure to do的主语可以是人，也可以是物， 表示说话人推测“一定；必然会”。例如：
He is sure of his success. /He is sure that he will succeed. 他确信他会成功。
He is sure to succeed. 他一定会成功。(说话人的看法
