语法突破 专题一 第5讲
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[典例] (广东卷语法填空)Now it occurred to him ______ his farm had much potential and that the death of the cow was a bit of luck.
解析：that [固定句型“it occurred to sb.＋that 从句”表示“某 人突然想到”，it 是形式主语，真正的主语是 that 引导的从句。]
语法突破 专题一
.5. What the police should do now is 6. that they must find out what led to the accident.They said it was difficult for them to judge because 7. how the accident happened is not clear.Perhaps the reason was 8. that the driver was too tired to stop the car in time.The driver didn't admit the fact 9. that he was driving too fast at the turning.The police doubted 10. whether what he said was true and decided to make a further investigation.
语法突破 专题一
4．主语从句要用陈述语序，即主谓语序。
◆[归纳总结]
(1)用 it 作形式主语的常用句型有：
①It ＋ 系 动 词 ＋ 形 容 词
(necessary/right/likelLeabharlann Baidu/unlikely/wrong/important/certain 等)＋that 从句
②It＋be＋名词(短语)(a pity/a shame/no wonder 等)＋that 从句
语法突破 专题一
2．whether 连接主语从句时，表示怀疑，不能省略，意为“是 否”，在句首时不能用 if 替换。
◆(重庆卷)It is still under discussion whether the old bus station should be replaced with a modern hotel or not.
语法突破 专题一
[考点一] 主语从句 1．that 引导主语从句时，没有具体意思，不充当句子成分，只 是起连接的作用，但 that 不能省略。what 引导时，在从句中充当成 分，且有意义。 ◆It is true that the college will take in more new students. 这所大学将招收更多的新生是真的。
很遗憾我错过了昨晚举行的聚会。
◆It is reported that the accident was caused by carelessness.
据报道，该事故源于(司机的)粗心(驾驶)。
语法突破 专题一
(2)在 It is necessary/important/suggested/advised/ordered＋that 从 句结构中，从句用“(should＋)动词原形”。
语法突破 专题一
[考点二] 宾语从句 1．that 连接宾语从句时通常可以省略(但多个并列的宾语从句中 只能省略第一个 that)，没有具体的意思，不充当句子成分，只是起 连接作用。what 引导时，在从句中充当成分，且有意义。 ◆(全国新课标卷Ⅰ)I'm writing to tell you that my uncle Li Ming is going to your city for a conference. 我写信是想告诉你我叔叔李明要去你的城市开会。
旧汽车站是否应该被重建为现代化的宾馆仍然在商讨中。 3．连接代词、连接副词引导主语从句时不能省略，并在从句中 充当句子成分。 ◆It was never clear why the man hadn't reported the accident sooner. 这个人为什么没有尽快报告这个事故，还不清楚。
③It＋be＋过去分词(said/told/reported/decided 等)＋that 从句
④It＋特殊动词(seems，appears，happens，matters)＋that 从句
◆It is a pity that I missed the party held last night.
语法突破 专题一
2．在 whether/if 连接的宾语从句中，whether/if 意为“是否”， 但在 whether...or not 结构中，或者 whether 引导的宾语从句作介词的 宾语时，以及 whether＋to do 结构中和 whether 引导的从句作少数动 词(如 leave，put，discuss，doubt，know 等)的宾语时，只能用 whether， 不能用 if 来替换。
高考总复习
王忠心英语
第 5 讲 名词性从句
阅读下面短文，根据本部分语法内容，在空白处填入 1 个关联词。 It was reported 1. that there was an accident at the corner of Roman Street this morning.No one saw 2. what on earth happened then.A car ran into a truck but fortunately，nobody got injured.3. Who will be responsible for the accident is still under investigation.The police were uncertain about 4. whether the driver was guilty
解析：that [固定句型“it occurred to sb.＋that 从句”表示“某 人突然想到”，it 是形式主语，真正的主语是 that 引导的从句。]
语法突破 专题一
.5. What the police should do now is 6. that they must find out what led to the accident.They said it was difficult for them to judge because 7. how the accident happened is not clear.Perhaps the reason was 8. that the driver was too tired to stop the car in time.The driver didn't admit the fact 9. that he was driving too fast at the turning.The police doubted 10. whether what he said was true and decided to make a further investigation.
语法突破 专题一
4．主语从句要用陈述语序，即主谓语序。
◆[归纳总结]
(1)用 it 作形式主语的常用句型有：
①It ＋ 系 动 词 ＋ 形 容 词
(necessary/right/likelLeabharlann Baidu/unlikely/wrong/important/certain 等)＋that 从句
②It＋be＋名词(短语)(a pity/a shame/no wonder 等)＋that 从句
语法突破 专题一
2．whether 连接主语从句时，表示怀疑，不能省略，意为“是 否”，在句首时不能用 if 替换。
◆(重庆卷)It is still under discussion whether the old bus station should be replaced with a modern hotel or not.
语法突破 专题一
[考点一] 主语从句 1．that 引导主语从句时，没有具体意思，不充当句子成分，只 是起连接的作用，但 that 不能省略。what 引导时，在从句中充当成 分，且有意义。 ◆It is true that the college will take in more new students. 这所大学将招收更多的新生是真的。
很遗憾我错过了昨晚举行的聚会。
◆It is reported that the accident was caused by carelessness.
据报道，该事故源于(司机的)粗心(驾驶)。
语法突破 专题一
(2)在 It is necessary/important/suggested/advised/ordered＋that 从 句结构中，从句用“(should＋)动词原形”。
语法突破 专题一
[考点二] 宾语从句 1．that 连接宾语从句时通常可以省略(但多个并列的宾语从句中 只能省略第一个 that)，没有具体的意思，不充当句子成分，只是起 连接作用。what 引导时，在从句中充当成分，且有意义。 ◆(全国新课标卷Ⅰ)I'm writing to tell you that my uncle Li Ming is going to your city for a conference. 我写信是想告诉你我叔叔李明要去你的城市开会。
旧汽车站是否应该被重建为现代化的宾馆仍然在商讨中。 3．连接代词、连接副词引导主语从句时不能省略，并在从句中 充当句子成分。 ◆It was never clear why the man hadn't reported the accident sooner. 这个人为什么没有尽快报告这个事故，还不清楚。
③It＋be＋过去分词(said/told/reported/decided 等)＋that 从句
④It＋特殊动词(seems，appears，happens，matters)＋that 从句
◆It is a pity that I missed the party held last night.
语法突破 专题一
2．在 whether/if 连接的宾语从句中，whether/if 意为“是否”， 但在 whether...or not 结构中，或者 whether 引导的宾语从句作介词的 宾语时，以及 whether＋to do 结构中和 whether 引导的从句作少数动 词(如 leave，put，discuss，doubt，know 等)的宾语时，只能用 whether， 不能用 if 来替换。
高考总复习
王忠心英语
第 5 讲 名词性从句
阅读下面短文，根据本部分语法内容，在空白处填入 1 个关联词。 It was reported 1. that there was an accident at the corner of Roman Street this morning.No one saw 2. what on earth happened then.A car ran into a truck but fortunately，nobody got injured.3. Who will be responsible for the accident is still under investigation.The police were uncertain about 4. whether the driver was guilty