(
课件网) The Subject Clause When a Sentence Becomes a Subject 探索句子的奥秘 ——— 主语从句 A Thought-Provoking Quote “What you do today can improve all your tomorrows.” 思考一下 ( Think about it): 1. What is the subject (主语) of this sentence 2. Is it a single word or a group of words What is a Subject Clause Definition / 定义 A subject clause is a clause that functions as the subject of a sentence. It acts like a noun. 主语从句是在句子中充当主语的从句，其语法功能与名词完全相同，因此也被称为“名词性从句”。 What is a Subject Clause Structure / 结构 Subject Clause + Predicate （引导词 + 从句内容） 充当整个句子的主语部分，后跟主句谓语。 What is a Subject Clause Examples / 示例对比 ● Simple Sentence His ideais brilliant. （主语：名词短语） ● Complex Sentence That he came up with this ideais brilliant. （主语：完整句子） The Key: Choosing the Right Conjunction 从属连词 (Subordinating) 引导词：that, whether 功能：that无意义，仅起连接作用， 不可省略； whether 表“是否”，起连接作用。 充当从句成分？否 (No) That he won the game surprised everyone. Whether she will come is still unknown. The Key: Choosing the Right Conjunction 连接代词 (Pronouns) 引导词：what, who, whom, whose, which 功能：连接句子 + 充当主语、宾语、表语或定语。 充当从句成分？是 (Yes) What he said is very important. "What" 作 said 的宾语 (Object) The Key: Choosing the Right Conjunction 连接副词 (Adverbs) 引导词：when, where, why, how 功能：连接句子 + 充当状语 (时间、地点、原因、方式)。 充当从句成分？是 (Yes) How he solved the problems is a mystery. "How" 作 solved 的方式状语 (Adverbial) that or what A Common Puzzle that— 只起连接作用，不充当成分 That he is honest is known to all. 分析：从句 "he is honest" 本身结构完整，that 仅作为连词连接主从句，不具实际含义，也不充当成分。 what— 既起连接作用，又充当成分 What he said is true. 分析：从句中 "said" 缺宾语，what 既连接主从句，又充当 "said" 的宾语，意为“...的话/内容”。 记忆口诀 (Mnemonic) ·that 只连接，what 要充当 whether or if 核心规则 (Rule)：当引导主语从句作句子主语时，只能用 whether，绝对不能用 if。 正确 (Correct) “Whether we will go campingdepends on the weather.” （主语从句作主语 ） 错误 (Incorrect) “If we will go campingdepends on the weather.” （主语从句不能用 if 引导 ） 用法拓展 (Extension)：`if` 仅能引导宾语从句。例：I don't knowif / whetherhe will come. Two Golden Rules 01. 语序 (Word Order) 主语从句必须使用陈述语序 (Subject + Verb)，不可使用疑问语序。 Correct: I don't know when the meeting will start. Incorrect: I don't know when will the meeting start. Two Golden Rules 02. 主谓一致 (Subject-verb Agreement) 当主语从句作句子主语时，整个从句视为一个整体，主句的谓语动词通常要用单数形式 (Singular Form)。 What he says is not important. When they will arrive is still a question. Challenge Time! 01. _____ he will come to the party remains a question. A. If B. That C. Whether D. What 02. _____ surprised me most was his attitude towards his studies. A. That B. What C. W ... ...
