| 主 | 谓 | 宾 |
|---|---|---|
| I | love | you. |
| think | he is awful. |
宾语从句的结构
| 主句 | 引导词 | 从句 |
|---|---|---|
| I think | that | he is awful.(主系表) |
| She says(一般现在) | he loved her. (一般过去) | |
| He knows(一般现在) | she has gone.(现在完成) | |
| He is sorry(一般现在) | he will leave.(一般将来) |
结论1：主句为“一般现在”，从句可以任意时态。
- I know (that) he will watch the movie. 我知道他会看电影的。
- I know (that) he has watched the movie. 我知道他已经看电影了。
- I know (that) he usually watches the movie. 我知道他经常看电影。
- I know (that) he is watching the movie. 我知道他正在看电影。
宾语从句的功能：表达观点
I think (that) … 我觉得
- I think (that) it is very good.
I believe (that) … 我相信
- Because we learn about what the PM2.5 is and what we must do.