别去讲理论,那样只会越说越糊涂.你看我翻个句子,这样比说理更明白具体：他一定会成功的He is sure to succeedI am sure of his success.I am sure that he will succeed.It is certain(这里不能用sure) that he will...is going to the film错误在哪 谢谢go to the film 这种说法没错倒是go to see the film 还有点chinglish我的感觉的还是它和 if he is not occupied 不搭Mike is going to the film this afternoon 迈克今下午要去看电影。这种be-v-ing 表将来的一般都是箭在弦上的事，后面再来个条件限制，不是很对味