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小学英语语法100期G88 · 状语从句(上)— 时间、原因、条件
发布时间：2026-10-03 09:33:06 最近访问：2026-10-03 09:33:07
小学英语语法100期G88 · 状语从句(上)— 时间、原因、条件
| 本期目标1. 理解什么是状语从句（一个句子给另一个句子当状语）2. 掌握时间状语从句（when / while / before / after / until / as soon as）3. 掌握原因状语从句（because / since / as）4. 掌握条件状语从句（if / unless）+ 牢记"主将从现" |
| 状语从句就是一个句子给另一个句子当状语（修饰动作发生的时间/原因/条件等）。对比理解：简单状语（词/短语）：I get up at 7:00.（介词短语修饰时间）状语从句（一个句子）：I get up when the sun rises.（一个句子修饰时间）第二句里 "when the sun rises" 就是一个完整的句子，它在修饰"起床"这个动作的时间，所以叫时间状语从句。 |
| 类型 | 常见连词 | 本期？ |
| 时间 | when, while, before, after, until, as soon as | ✔ 本期 |
| 原因 | because, since, as | ✔ 本期 |
| 条件 | if, unless | ✔ 本期 |
| 让步 | although, though, even though | 下期 |
| 目的 | so that, in order that | 下期 |
| 结果 | so...that, such...that | 下期 |
| 连词 | 意思 | 用法要点 | 例句 |
| when | 当...时 | 最常用，接长动作或短动作 | I was reading when she came. |
| while | 当...时 | 只接持续动作（进行时），不接短动作 | She was singing while her mother was cooking. |
| as | 一边...一边随着 | 两个动作同时进行 | As he grew older, he became wiser. |
| 经典公式（中考必背！）was/were doing + when + 一般过去时（正在做某事，这时突然...）I was walking home when I met an old friend.was/were doing + while + was/were doing（两个动作同时进行）Mom was cookingwhile Dad was reading. |
| 连词 | 意思 | 用法要点 | 例句 |
| before | 在...之前 | 从句在前，主句在后 | Wash your hands before you eat. |
| after | 在...之后 | 从句在前，主句在后 | After he finished homework, he played games. |
| until | 直到...为止 | not...until = 直到...才 | I didn't go to bed until Mom came back. |
| as soon as | 一...就 | 表示前脚后脚 | I'll call you as soon as I arrive. |
| 时间状语从句的语序从句可以放在主句之前，也可以放在主句之后。从句在前时，要用逗号隔开：When I was young, I liked cartoons.从句在后时，不用逗号：I liked cartoons when I was young. |
| 在时间状语从句和条件状语从句中，如果主句是一般将来时，从句必须用一般现在时（主将从现）。触发连词：when, while, before, after, as soon as, until, if, unless经典公式：主句（一般将来时）+ 从句（一般现在时） |
| 错误写法 | 正确写法 |
| I'll call you when I will arrive. | I'll call you when I arrive. |
| If it will rain tomorrow, I'll stay home. | If it rains tomorrow, I'll stay home. |
| She'll go to bed after she will finish homework. | She'll go to bed after she finishes homework. |
| 记住：时间/条件状语从句中，从句里永远看不到 will！但这并不意味着从句就是"现在"的事，它表达的是"将来"。记忆口诀：when/if 一出现，未来 will 靠边站！ |
| 连词 | 语气 | 位置 | 要点 | 例句 |
| because | 最强 | 主句后 | 直接回答 Why，不能和 so 连用 | I stayed home because it rained. |
| since | 中等 | 句首 | 既然（双方都知道） | Since you are free, let's go. |
| as | 最弱 | 句首/中 | 由于（附带原因） | As it's late, I must go. |
| because 与 so 互斥（核心考点！）中文："因为下雨，所以我待在家。"英文：Because it rained, I stayed home. It rained, so I stayed home.不能：Because it rained, so I stayed home. （中文式英语陷阱！） |
| 连词 | 意思 | 公式 | 例句 |
| if | 如果 | If + 主将从现 | If it rains, I will stay home. |
| unless | 除非= if not | Unless + 主将从现 | Unless it rains, I will go.= If it doesn't rain, I will go. |
| unless = if...not 互换You won't pass unless you study hard. = You won't pass if you don't study hard.注意：unless 本身已经含有否定意味，从句中不能再加 not！不能说：unless you don't study hard（双重否定！） |
| 状语从句三兄弟口诀when当其时before之前after之后，until不到as soon as一...就。because因为so不共存，if如果unless除非，时间条件状从主将从现不回头！ |
| 题号 | 题目 | 选项 |
| 1 | I was reading a book _______ my mother came in. | A. whileB. whenC. because |
| 2 | _______ he is only 10, he can speak three languages. | A. BecauseB. AlthoughC. If |
| 3 | I'll tell him the news _______ he comes back. | A. untilB. as soon asC. while |
| 4 | You won't catch the bus _______ you hurry up. | A. ifB. whenC. unless |
| 5 | If it _______ tomorrow, we will stay at home. | A. rainsB. will rainC. rained |
| 第二关：用 when/while/before/after/until 填空（5题） |
| 6. She was cooking _______ her husband was watching TV.7. I didn't know the truth _______ he told me.8. Wash your hands _______ you have meals.9. _______ I got home, I found the door was open.10. She will go to bed _______ she finishes her homework. |
| 11. Because it was raining, so I took an umbrella.12. I'll call you when I will get home.13. If she will come tomorrow, I'll be happy.14. He was watching TV while his phone rang.15. Unless you don't study, you will fail the exam. |
| 第一关：选择1. B - "was reading + when + 一般过去时"是经典搭配：正在看书时妈妈进来了。while 后面要接持续动作。2. B - "只有10岁"和"会说三门语言"是转折关系，用 Although（虽然/尽管）。3. B - as soon as 表示"一...就"，主将从现：I'll tell...he comes...4. C - unless = if you don't。"你不会赶上公交车，除非你快点"= "如果你不快点，就赶不上"。5. A - 条件状语从句"主将从现"：if 从句用一般现在时 rains，不能用 will rain。 |
| 第二关：填空6. while - 两个持续动作同时进行（cooking 和 watching）。7. until - not...until 句型："直到他告诉我，我才知道真相"。8. before - 吃饭前洗手。9. When/After - 到家时/到家后，发现门开着。10. after - 做完作业后去睡觉。 |
| 第三关：改错11. 去掉 so — Because it was raining, I took an umbrella. 或者 It was raining, so I took an umbrella. because 和 so 不能共用。12. I'll call you when I get home. — 时间状语从句主将从现，从句去掉 will。13. If she comes tomorrow, I'll be happy. — 条件状语从句主将从现，从句用 comes 不用 will come。14. He was watching TV when his phone rang. — phone rang 是短动作，不能用 while（while 只接持续动作）。15. Unless you study, you will fail. — unless 已含否定意思，不能说 unless you don't study（双重否定）。正确意思是"除非你学习，否则你考试会不及格"。 |
| 本期核心总结时间：when万能 / while只接持续 / as soon as一...就原因：because最强答Why / since既然 / as由于条件：if如果 / unless除非（=if not）黄金法则：时间/条件状从 主将从现下期预告：G89 状语从句（下）让步、目的、结果 |
| 小学英语语法100期 · G88 · 状语从句（上）| 从句系列 |