3.主语从句不可位于句首的五种情况 (1)if引导的主语从句不可居于复合句句首。 (2) It is said,( reported).结构中的主语从句不可提前。例如: It is said that President Hu will visit our school next week. (right) That President Hu will visit our school next week is said. (wrong) (3) It happens., It occurs..结构中的主语从句不可提前。例如: It occurred to him that he failed in the examination. (right That he failed in the examination occurred to him.(wrong) (4) It doesn 't matter how/whether.结构中的主语从句不可提前。 例如: It doesn't matter whether he is wrong or not. (right) Whether he is wrong or not doesnt matter. (wrong) (5)含主语从句的复合句是疑问句时,主语从句不可提前。例如: Is it likely that it will rain in the evening?(right a Is that will rain in the evening likely? (wrong)◼ 3. 主语从句不可位于句首的五种情况 ◼ (1) if 引导的主语从句不可居于复合句句首。 ◼ (2) It is said , (reported) …结构中的主语从句不可提前。例如： ◼ It is said that President Hu will visit our school next week. (right) ◼ That President Hu will visit our school next week is said. (wrong) ◼ (3) It happens…, It occurs… 结构中的主语从句不可提前。例如： ◼ It occurred to him that he failed in the examination. (right) ◼ That he failed in the examination occurred to him. (wrong) ◼ (4) It doesn’t matter how/whether …结构中的主语从句不可提前。 例如： ◼ It doesn’t matter whether he is wrong or not. (right) ◼ Whether he is wrong or not doesn’t matter. (wrong) ◼ (5) 含主语从句的复合句是疑问句时，主语从句不可提前。例如： ◼ Is it likely that it will rain in the evening? (right) ◼ Is that will rain in the evening likely? (wrong)