28.1 时态速查
| 时态 | 形式 | 核心含义 | 例句 |
|---|
| 一般现在时 | do/does | 习惯、事实、状态 | She works hard. |
| 现在进行时 | am/is/are doing | 正在进行 | She is working now. |
| 一般过去时 | did | 过去发生 | She worked yesterday. |
| 过去进行时 | was/were doing | 过去某时正在进行 | She was working at 8. |
| 一般将来时 | will do / be going to do | 将来 | She will work tomorrow. |
| 现在完成时 | have/has done | 过去影响现在/持续到现在 | She has finished it. |
| 过去完成时 | had done | 过去的过去 | She had left before I arrived. |
| 将来完成时 | will have done | 到将来某时完成 | She will have finished it by Friday. |
28.2 从句速查
| 从句类型 | 作用 | 例句 |
|---|
| 名词性从句 | 当名词用 | I know that he is right. |
| 定语从句 | 修饰名词 | The book that I bought is useful. |
| 状语从句 | 表示时间、原因、条件等 | If it rains, we will stay home. |
28.3 非谓语速查
| 形式 | 常见含义 | 例句 |
|---|
| to do | 目的、将来、具体动作 | I came to help you. |
| doing | 主动、进行、动名词 | Reading is useful. |
| done | 被动、完成 | The broken window was repaired. |
28.4 介词速查
| 介词 | 核心感觉 | 例句 |
|---|
| in | 在内部/较长时间 | in the room, in May |
| on | 在表面/具体某天 | on the table, on Monday |
| at | 点/具体时刻 | at the door, at 7:00 |
| for | 为了/持续 | for you, for three years |
| since | 自从 | since 2020 |
| by | 通过/截止/被 | by bus, by Friday |
| with | 和/用具体工具 | with friends, with a pen |
英语语法的真正价值，不是为了背术语，而是帮助你更准确地理解和表达。学习时可以记住一个简单原则：
先抓主干，再看修饰；
先看时间，再看逻辑；
先求准确，再求漂亮。
只要坚持分析句子、模仿例句、主动写作，语法会慢慢从“规则”变成“语感”。