ARTICLE · 1115559
高中英语语法精讲 ⑮|时间·条件·让步 4 大从句 + 10 个易错点
高中英语语法精讲 · 第 15 期
导语
先看一句作文里的高频病句：
❌ Although he was tired, but he kept working.
中文里"虽然……但是……"成对出现，英语里却不允许——although 和 but 只能留一个。再看一道经典三选一：______ I was doing my homework, the lights went out. 选 when、while 还是 as？很多同学全凭语感。今天把时间、地点、条件、让步四大从句一次铺开。
一、先建立地图：状语从句四大金刚
状语从句回答的是"什么时候、在哪儿、什么条件下、尽管怎样"。引导词不同，从句的性质就不同：
| 时间 | ||
| 地点 | ||
| 条件 | Unless | |
| 让步 | Although |
三条总规则先立住：
- 主将从现
：主句用将来时，时间/条件从句用一般现在时表将来。 - 从句一律用陈述语序
（第 11 期讲过的铁律，状语从句同样适用）。 - 一个从句一个连词
：汉语成对，英语单飞。
下面 10 个易错点，全是高考和作文里反复出现的。
二、10 个高频易错点
1. when / while / as：一句话分清
| when | ||
| while | ||
| as |
- When
he came in, I was reading.（他进来时，我正在看书。） - While
I was cooking, she was watching TV.（我做饭时她在看电视。） - As
I get older, I become more patient.（随着年纪变大，我越来越有耐心。）
口诀：when 管点也管段，while 只管一段，as 管同步"随着"变。
2. when 的隐藏用法："这时突然"
when 还能引导一个"出其不意"的句子，前面常是进行时或 be about to do：
I was walking in the street when I ran into my old friend.（我正在街上走着，这时碰见了老朋友。） He was about to leave when the phone rang.（他正要离开，这时电话响了。）
这里的 when = and at that moment，不能换成 while。
3. until：肯定否定各管一半
❌ I didn't wait until he came. → ✅ I didn't leave until he came. 判断方法："没等到"这个状态撑不满 until 之后的时间，所以否定句里要用能"戛然而止"的动词。
4. 主将从现：条件、时间从句的将来时要用现在时
❌ If it will rain tomorrow, we'll stay at home. ✅ If it rains tomorrow, we'll stay at home.（如果明天下雨，我们就待在家里。） ✅ I'll tell him the news as soon as he arrives.（他一到我就告诉他这个消息。）
注意例外：unless = if…not，中文"除非"，本身已含否定。 ❌ You'll fail unless you don't work hard. → ✅ You'll fail unless you work hard.
5. although / though：不许和 but 连用
❌ Although it was late, but we went on working. ✅ Although it was late, we went on working.（尽管天晚了，我们仍继续工作。） ✅ It was late, but we went on working.
想加强语气，可以配 yet / still（它们是副词，不是连词）：
✅ Although it was late, we still went on working.
另外，though 可以放句尾，although 不行：
✅ He said he would come. He didn't, though.（他说会来，不过最后没来。）
6. as 的让步倒装：形容词、名词往前提
让步意义的 as 用倒装结构：形容词 / 名词 / 动词 + as + 主语 + 谓语。
- Young as
he is, he knows a lot.（尽管他年纪小，懂得却很多。） - Child as
he is, he can speak three languages.（尽管还是个孩子，他已会说三种语言。） - Try as
he might, he couldn't open the door.（尽管努力试了，他还是打不开门。）
三条硬规矩：
提前的名词前不带冠词：Child as he is（不是 a child）。 though 也能这样倒装（Young though he is），although 绝对不能。 主动词提前时，后面补 do/does/did：Fail as I did, I never gave up.
口诀：as 倒装表让步，冠词扔掉再让路；although 规矩最死板，倒装一律不沾边。
7. while 的第二职业：表对比和让步
while 不只是"当……时"，高考完形和阅读最爱考它的另外两副面孔：
- 表对比
（两件事相对照，常放句中）：I like tea, while my brother likes coffee.（我喜欢茶，而我弟弟喜欢咖啡。） - 表让步
（= although，常放句首）：While I admit the problem is difficult, I don't think it can't be solved.（虽然我承认问题很难，但我不认为它无法解决。）
判断技巧：看句中有没有"对照"的味道——前后两件事一比高下，就是对比 while。
8. "no matter + 疑问词"与"疑问词 + ever"：不是完全等价
| 只引导让步状语从句 | No matter what | |
❌ I'll believe no matter what you say. ✅ I'll believe whatever you say.（believe 后缺宾语，是名词性从句，no matter 不能用。）
一句话：no matter 进不了名词性从句的门。
9. 条件从句三兄弟：unless / as long as / provided that
| unless | Unless | |
| as long as | ||
| provided (that) | Provided that |
❌ Unless you don't hurry…（unless 自带否定，再叠 not 就双重否定了）
10. where：地点从句和定语从句一字符区分
状语从句的 where 前面没有先行词：Build a school where children can reach easily.（把学校建在孩子们容易到达的地方。） 定语从句的 where 前面必须有地点名词：This is the school where I studied.（这是我上学的那所学校。）
判断方法：where 前面删得掉名词吗？ 删得掉说明那不是先行词，where 前无依托，就是状语从句。第 14 期的"还原法"在这里依然管用。
三、高考风格演练（4 题）
1. 语法填空：______ I was about to go to bed, there was a knock at the door. A. While B. When C. As D. Until
答案：B 解析：was about to do…when…是固定搭配，"正要做某事，这时……"。while 不能接短暂性的 knock 发生的语境，until 逻辑不通。
2. Don't leave the classroom until your homework ______. A. will finish B. is finished C. will be finished D. finishes
答案：B 解析：时间状语从句"主将从现"，主句 Don't leave 是将来含义，从句用一般现在时；homework 与 finish 是被动关系，故用 is finished。
3. ______, the work can be done much better. A. As he is young B. Young as he is C. Though young he is D. Although he is young but
答案：B 解析：as 让步倒装，形容词 Young 提前。A 未倒装，C 的 though 不这样倒装，D 虽然倒装格式混乱且 although…but 连用必错。
4. 短文改错：No matter what you do in the future, that is what really matters is that you do it well.
答案：that is → what 解析：is 后面的从句缺主语，是名词性从句，必须用 what；no matter what 只能引导让步状语从句，不能充当名词性从句的引导词。
四、随堂练习（5 题）
1. ______ the story is short and simple, there is a lot to think about. A. While B. For C. If D. So
2. I'll go to the party with you ______ you don't wear those jeans. A. on condition that B. as well as C. so that D. even though
3. ______ hard he tried, he couldn't work out the physics problem. A. Whatever B. However C. Though D. Even if
4. He was reading ______ his sister was playing the piano, and neither of them noticed me come in. A. when B. as soon as C. while D. until
5. 短文改错：Although it was raining hard, but the students kept practicing on the playground.
参考答案
- A
。while 表让步"尽管"，前后是转折对照关系：故事虽短，值得思考的地方很多。 - A
。on condition that"条件是"，符合"别穿那条牛仔裤"的条件语境；as well as 和 so that 逻辑不通，even though 让步也不合句意。 - B
。However + 形容词/副词 + 主谓，="no matter how"表让步；Whatever 只能接名词，不能接 hard。 - C
。两句都是延续性动作且平行进行（reading / playing），表对比用 while。 - 删去 but
。although 与 but 不能连用，保留其一即可。
五、一句话总结
状语从句第一讲，三句话带走：
- when 管点也管段，while 只管一段还能"对比""尽管"，as 管同步"随着"还能倒装表让步。
- 主将从现：时间、条件从句里，将来时一律改一般现在时。
- although 不带 but，as 倒装不带冠词，no matter 进不了名词性从句。
下期预告： 状语从句（二）——原因、结果、目的三大从句；so that 与 such…that 的"so/such"之争，写作升级就靠它们。从句专题进入收官阶段。
如果这篇对你有用，收藏起来考前再刷一遍；身边有正在为语法头疼的同学，转给他。