名词性从句的来龙去脉及底层逻辑 导学案 2023-2024学年陕西省省级教学能手语法课

名词性从句 名词性从句的本质： 名词性从句就是用三种句子分别充当另外一个句子的四种句子成分。 三种句子： 四种句子成分： 名词性从句的引导词 对应的简单句类型 引导词是否做成分 引导词是否省略 连词 . 陈述句 连词 . 不能 连接副词when,where,why,how; 连接代词who,whom,what, which,whose when,where,why,how在从句中作状语； who,whom,what作主、宾、表语； which和whose作定语，后面+名词使用 if还是whether? 1. if只用于动词后的宾语从句（不引导介词后的宾从）,whether引导所有名词性从句； he comes or not makes no difference. The question is he will come. I asked her she had a bike. 2. if不和or not直接连用，即一般不说if or not, 但可以说if...or not。whether没有此限制。 I don’t know or not he comes. 3. if不和不定式 to do 连用 I don’t know to go. 1. I asked her she had a bike. 2. we will hold a party in the open air tomorrow depends on the weather. 3. We’re worried about he is safe. 4. The question is he has finished the task. 特殊疑问句作名词性从句 1. 变倒装语序为 语序； Why did dinosaurs become extinct? It is still a mystery 2. 特殊疑问词作 ，无需调整语序 Who will chair the meeting? It has not yet been decided. 主语从句句型 It is necessary / important/ obvious/... that… It is believed that… 人们相信… It is known to us all that …. 众所周知… It has been decided that…… 已经决定…… It is common knowledge that… …是常识 It is a surprise that …. 令人惊奇的是… It is a fact that…… 事实是…… It appears that… 似乎… It happens that …. 碰巧… It turns out that …… 结果证明是… It dawned upon/on sb. that.