宾语从句（Object Clause）：在复合句中作宾语的从句叫做宾语从句。宾语从句通常放在主句的谓语动词或介词之后，由连接词引导。
宾语从句的三要素：引导词、语序、时态
引导词类型：
1. that（陈述句）：可省略，如 I think (that) he is right.
2. if/whether（一般疑问句）：是否，如 I don't know if/whether he will come.
3. 特殊疑问词（特殊疑问句）：what, when, where, why, how等
语序：宾语从句用陈述语序（主语 + 谓语）
时态：
1. 主句现在时，从句根据实际情况用任何时态
2. 主句过去时，从句用相应的过去时态（客观真理除外）
3. 客观真理、自然现象等永远用一般现在时
常见动词：think, know, say, tell, ask, wonder, believe, hope, hear等
注意：whether可与or not连用，if不能；介词后只能用whether
I think (that) he is right.
I don't know if/whether he will come.
I don't know what he is doing.
宾语从句要用陈述语序，不能用疑问语序
错误：I don't know what is he doing. ✗
正确：I don't know what he is doing. ✓
主句是I think/believe/suppose等，变否定时否定前移
例：I don't think he is right. (不说I think he isn't right.)
whether vs if：
- whether可与or not连用，if不能
- 介词后用whether，不用if
- 句首用whether，不用if
时态呼应很重要，注意主句时态决定从句时态
用that, if/whether或特殊疑问词填空： 1. I think ___ he is a good student. 2. I don't know ___ he will come tomorrow. 3. Can you tell me ___ she lives?
判断从句类型
💬 1. that (陈述句，可省略) 2. if/whether (一般疑问句，'是否') 3. where (特殊疑问句，问地点)
1. that 2. if/whether 3. where
通过游戏掌握宾语从句的构成和用法
I don't know ___ he will come tomorrow.
Can you tell me ___?
The teacher told us that the earth ___ around the sun.
I want to know ___ he will come or not.
将下列句子改为宾语从句： 1. Is he a teacher? I don't know ___. 2. What is his name? Can you tell me ___? 3. When will he come? I wonder ___.
用括号内动词的适当形式填空，并说明原因： 1. I think he ___ (be) right. 2. I thought he ___ (be) right. 3. He said that he ___ (finish) his homework already. 4. The teacher said that light ___ (travel) faster than sound.