| 身份 | 从句类型 | 扮演角色? | 例句 |
|---|---|---|---|
| 指示代词 | — | 不需要从句 | That is my book. |
| 连词 | 名词性从句 | 否 | I know that he is right. |
| 连词 | 同位语从句 | 否 | The news that he won... |
| 关系代词 | 定语从句 | 主/宾 | The book that I read... |
| 强调句 | 强调句型 | 特殊 | It is Tom that helped us. |
| 身份 | 含义 | 扮演? | 例句 |
|---|---|---|---|
| 连词·时间 | 当……时 | 否 | As I walked, I saw her. |
| 连词·原因 | 因为 | 否 | As it rained, we stayed. |
| 连词·方式 | 按照 | 否 | Do as I told you. |
| 连词·让步 | 虽然 | 否 | Young as he is, he knows a lot. |
| 关系代词 | 正如 | 主/宾 | As we expected, he failed. |
| 介词 | 作为 | — | He works as a teacher. |
| 固定搭配 | as...as / such as / as if | — | as soon as possible |
| 场景 | whether | if |
|---|---|---|
| 宾语从句 | ✅ | ✅ |
| 主语从句 | ✅ | ❌ |
| 表语从句 | ✅ | ❌ |
| 同位语从句 | ✅ | ❌ |
| 介词后 | ✅ | ❌ |
| 不定式前 | ✅ (whether to do) | ❌ |
| 与 or not 紧贴 | ✅ | ❌ |