题目内容：

be sure to/be sure of举例区别

优质解答

be sure to do sth.如：They are sure to be late.be late 是一个动词而不是句子be sure of+名词 如：We're sure of his innocence.在意思上sb.be sure to do表示某人一定会做某事,用于祈使句可以表示“一定要……”...