宾语从句是把一个句子当作动词的宾语，中考必考！
◆ 三要素：引导词 + 语序 + 时态
1. 引导词
· 陈述句用 that（可省略）：I think (that) he is right.
· 一般疑问句用 if / whether（是否）：I don't know if he will come.
· 特殊疑问句用原来的疑问词：Can you tell me where he lives?
2. 语序：从句必须用陈述语序（主语在前，动词在后）！
· Do you know where does he live? ✗
· Do you know where he lives? ✓
3. 时态呼应
· 主句是一般现在时，从句按需要用任何时态：I know he will come.
· 主句是过去时，从句要用相应的过去时态：He said he was busy.
· 例外：客观真理永远用一般现在时：The teacher said the earth goes around the sun.