例如： 正确表达：It occurred to him that he failed in the examination. 错误表达：That he failed in the examination occurred to him. （4）It doesn’t matter how/whether …结构中的主语从句不可提前。例如： 正确表达：It doesn’t matter whether ...

英语中，副词的用法比形容词灵活得多。 ① 可置于整句之前，如：Unfortunately, he failed to make it. ② 可置于整句之后，如：The teacher greets his students individually. ③ 可置于"助动词、系动词、情态动词之后，实义动词之前"，如： The princess looks extremely beautiful ...