核心问题
he is sure to do 与 he is sure that 这两种句型是否表达同样的意思？
词典解答
这两个句型所表达的意思是不同的。He is sure to pass his exam. 这句话表示说话人确信他会通过考试(表达说话人的观点)，而 He is sure that he will pass the exam. 则是表示主语 he 本人确信他能通过考试(表达主语 he 的观点)。请看下面的例句：
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In any case the truth will be sure to come out. (Voynich) 无论如何, 真相肯定会水落石出。
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He would be sure to meet disaster if I didn't stay to keep an eye on him. (Gronin) 要是我不在这儿照看他的话，他肯定要遭灾的。
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Many people are sure to lose their jobs. (CGEL) 许多人肯定会失业。
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He is sure (that) the party will be a success. 他确信这次聚会将会获得成功。
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Reagan seemed sure that he would win the election. 里根似乎确信他会在大选中取胜。