# 英语中级 · 第 2 周 Day 2|条件句五类填空 > 系列:语种学习 / 英语 / 中级 · 每日学习|AI生成|2026-10-27|codebuddy **今天学什么** 今天把条件句一次学完:零条件、第一、第二、第三、混合,五类的区别只在两件事——if 从句退到哪一步,主句退回哪一步。很多人写错不是因为不懂意思,是 if 从句里习惯性塞 will 或 would。今天用 15 个空把五类各练三遍,错的抄进本子,并弄清 unless、provided that、in case 三个连词的分工。学完你能给任意一句「如果……就……」选出正确时态,也能判断一句条件句的结果落在现在还是过去,为 Day 4 的改期邮件准备两个不会出错的假设句。 ## 一、今日任务 | 环节 | 时长 | 具体动作 | 产出 | | --- | --- | --- | --- | | 1. 建五类表 | 10 min | 不看范例,先在纸上默写五类的「if 从句时态 + 主句时态」,写完再对照第三部分改 | 一张手写时态对照表 | | 2. 读规则 | 12 min | 读第三部分五条规则,每条下面补一个自己的例子,例子必须和工作有关 | 五个自造句 | | 3. 做 15 空 | 18 min | 做第五部分 B,限时 18 分钟,不许翻规则;不会的先填一个,做标记 | 15 个答案 | | 4. 对答案抄错题 | 12 min | 逐题对答案,错题连原句一起抄,旁边用中文写「从句该退到哪一步」 | 错题本 | | 5. 分类归档 | 8 min | 把 15 句按五类分栏抄成一张表,每类三句,标出自己错的那一类 | 15 句分类表 | 总时长 60 分钟。第 3 步必须限时,不限时你会靠语感慢慢试,试出来的答案记不住;限时错的地方,才是真正要补的地方。 ## 二、核心词汇与搭配 | 单词 | 音标 | 词性 | 释义 | 高频搭配 | 例句 | | --- | --- | --- | --- | --- | --- | | unless | /ənˈles/(≈厄恩莱斯·轻) | conj. | 除非;如果不 | unless you object;unless stated otherwise | Unless the client objects, we will sign on Friday. 除非客户反对,我们周五就签约。 | | provided that | /prəˈvaɪdɪd ðæt/ | conj. | 只有在……条件下(正式) | provided that all sides agree | We can ship early, provided that the deposit arrives. 只要定金到账,我们可以提前发货。 | | in case | /ɪn ˈkeɪs/ | phr. | 以防万一(不是条件) | in case it rains;just in case | Take a copy in case the system fails. 带一份副本,以防系统出故障。 | | otherwise | /ˈʌðəwaɪz/(≈阿兹厄怀兹) | adv. | 否则 | hurry, otherwise…;say otherwise | We need the file today; otherwise the launch slips. 我们今天要这份文件,否则上线要推迟。 | | as long as | /əz ˈlɒŋ əz/ | phr. | 只要(口语化的 provided that) | as long as it works | As long as the budget is approved, we can start. 只要预算批了,我们就能开始。 | | suppose | /səˈpəʊz/(≈瑟波兹·轻) | v. | 假设(引出条件) | suppose we…;supposing that… | Suppose we moved the call to Friday—would that help? 假设我们把电话挪到周五,会有帮助吗? | | depend on | /dɪˈpend ɒn/ | phr. | 取决于 | it depends on whether… | The date depends on whether the client is available. 日期取决于客户是否有空。 | | priority | /praɪˈɒrəti/(≈普赖奥若提) | n. | 优先事项 | top priority;set priorities | If we cut the budget, our top priority will be delivery. 如果削减预算,我们的首要任务将是交付。 | 三个连词最值得花时间:unless 等于 if not,所以后面不能再加 not;provided that 最正式,适合合同和邮件,口语里换成 as long as;in case 是「提前做准备」,主句的动作先发生,后面的从句是预防对象,不是触发条件。otherwise 常和条件句配对使用:先说条件,再说 otherwise 引出反面的结果,一句话就能把利弊说清。 ## 三、语法点:条件句就是「退一步」 **规则** 1. 零条件:if + 一般现在,主句一般现在。说的是规律、习惯、说明书式的因果,不指向某一次。 2. 第一条件:if + 一般现在,主句 will + 动词原形。说的是将来很可能发生的事,主句用 will,从句用现在时(主将从现)。 3. 第二条件:if + 一般过去,主句 would / could + 动词原形。说的是现在或将来不现实、不太可能的事;be 动词统一用 were。 4. 第三条件:if + had + 过去分词,主句 would have + 过去分词。说的是过去没发生的事,重点是后悔或复盘。 5. 混合条件:从句用 had done,主句用 would do。判断方法只有一个——看结果落在什么时候:结果在现在,主句用 would do;结果在过去,主句用 would have done。 **正误对比** | 错误 | 正确 | 原因 | | --- | --- | --- | | If I would have known, I would have called. | If I had known, I would have called. | if 从句里不用 would,第三条件从句固定 had done | | If I will have time, I will join. | If I have time, I will join. | 主将从现,从句不出现 will | | If we had booked earlier, we would have a better slot now. | 正确(混合) | 结果落在现在(now),主句用 would do,不用 would have done | | In case it rains, we will cancel the picnic. | If it rains, we will cancel the picnic. | in case 是预防,不是「如果发生就……」的条件 | **常见错误** 1. 从句里塞 would:这是最高频的错,改法很机械——看到 if 后面有 would,先删掉,再判断该用过去式还是 had done。 2. 第二条件里 be 动词用 was:If I was you 在口语里能听到,但书面一律 If I were you。 3. 混淆第二和第三条件:判断标准是「这事还可能发生吗」。还可能,用第二;已经过去、无法重来,用第三。 **怎么在三十秒内选对** 拿到一句先问三个问题:这件事发生了没有?还可能发生吗?结果落在过去还是现在?三个答案对应一张表:没发生且不可能,第二条件;已经过去且没做成,第三条件;将来很可能,第一条件;讲规律,零条件。别从中文的「如果」出发,中文的「如果」五类通用,英语的 if 要看你站在哪个时间点上说话。 ## 四、句型与范例 | 句型 | 中文 | 使用场景 | | --- | --- | --- | | If + 现在时, … will … | If the payment arrives on Friday, we will ship on Monday. 如果款项周五到,我们周一发货。 | 排期、承诺 | | If + 过去时, … would … | If we had two more engineers, we would finish by June. 如果我们再多两名工程师,六月就能完成。 | 谈资源缺口 | | If + had done, … would have done … | If we had tested the app earlier, we would have caught the bug. 如果我们早点测试,就能发现这个漏洞。 | 复盘、道歉 | | If + had done, … would … now | If we had hired her last year, we would be in a better position now. 如果去年招了她,我们现在处境会好些。 | 复盘影响现在 | | Unless + 现在时, … will … | Unless you object, I will book the room today. 除非你反对,我今天就订房间。 | 默认执行 | | Provided that + 现在时, … can … | Provided that the budget is approved, we can start in May. 只要预算获批,我们五月就能开始。 | 正式条件 | | Suppose + 过去时, would …? | Suppose we moved the call to Friday—would that help? 假设挪到周五,会有帮助吗? | 提方案 | | It depends on whether + 句子 | It depends on whether the client signs this week. 这取决于客户本周是否签字。 | 不承诺 | **一段可套用的邮件片段(条件句两处,礼貌请求一处)** If we moved the meeting to Thursday, we would have the full report ready. 如果把会议改到周四,我们就能准备好完整报告。 Would Thursday at 10 a.m. work for you? 周四上午十点你方便吗? Unless you prefer another time, I will send the invitation today. 除非你想要别的时间,我今天就发邀请。 If you could confirm by Wednesday, I would appreciate it. 如果你能在周三前确认,我会很感激。 这四句可以直接搬进 Day 4 的初稿:第一句给理由,第二句给备选,第三句表示默认执行,第四句收尾。注意第四句里 if 从句用了 could,这不是时态错,而是把请求包在条件句里的固定客气说法,属于「if + could」的礼貌用法,和第三条件的 had done 不是一回事。 ## 五、练习 **A 词汇与翻译** 1. 用 unless / provided that / in case / otherwise 填空:______ you object, I'll book the room. / Take a charger ______ your phone dies. / We can start on Monday, ______ the contract is signed. / Write it down, ______ you will forget. 2. 中译英:除非客户反对;只要预算批准;以防万一下雨;否则我们会迟到。 3. 改错:Unless you don't confirm, we will go ahead. 4. 改错:In case it will rain, take an umbrella. 5. 用 depend on 写一句,说明日期为什么定不下来。 6. 用 suppose 提一个方案,句末用问号。 7. 把 unless you object 换成 if 从句,意思不变。 **B 语法填空(15 空,限时 18 分钟)** | 序号 | 句子 | 类型 | | --- | --- | --- | | 1 | If you heat water to 100°C, it ______ (boil). | 零条件 | | 2 | If we miss the deadline, the client ______ (charge) us a fee. | 第一条件 | | 3 | If the team ______ (have) more time, we would test more cases. | 第二条件 | | 4 | If I ______ (know) the venue had changed, I would have told you. | 第三条件 | | 5 | If we ______ (book) the room earlier, we would have a better slot now. | 混合条件 | | 6 | Unless the client ______ (object), we will sign on Friday. | 第一条件 | | 7 | If she ______ (not / finish) the report by six, we will send it on Monday. | 第一条件 | | 8 | We would have caught the bug if we ______ (test) the app earlier. | 第三条件 | | 9 | If I ______ (be) you, I would ask for written confirmation. | 第二条件 | | 10 | Provided that everyone ______ (agree), we will start next week. | 第一条件 | | 11 | If he ______ (not / call) back, I will email him this afternoon. | 第一条件 | | 12 | If we had hired her last year, we ______ (be) in a better position now. | 混合条件 | | 13 | If you ______ (need) anything else, please let me know. | 第一条件 | | 14 | I would have apologized if I ______ (realize) it was your birthday. | 第三条件 | | 15 | If the invoice ______ (arrive) tomorrow, we will process the payment on Monday. | 第一条件 | **C 输出** 1. 把 15 句按五类抄成一张分类表,每类三句,错的类型用红笔圈出(今日主产出之一)。保存为 Day02_条件句15题.txt。 2. 用自己工作里的事由,每类补写一句,共五句,口头读两遍并录 60 秒。保存为 Day02_五类自造句.txt。 ## 六、参考答案 **A** 1. Unless / in case / provided that / otherwise。unless 后接肯定形式,因为本身已含否定。 2. Unless the client objects;provided that the budget is approved;in case it rains;otherwise we will be late. 3. Unless you confirm, we will go ahead。unless 已等于 if not,再加 don't 就变成双重否定。 4. In case it rains, take an umbrella。in case 从句用现在时表将来,不用 will。 5. The date depends on whether the client is available next week. 6. Suppose we moved the meeting to Thursday—would that work? 7. If you do not object, I will book the room. 语序和时态都不变,只把 unless 拆成 if not。 **B** 1. boils。零条件,两边都用一般现在;主语 it 加 -s。 2. will charge。第一条件,主句 will + 原形。 3. had。第二条件从句退到过去式,have 的过去式是 had。 4. had known。第三条件从句用 had done,不能用 would have known。 5. had booked。从句是过去完成,主句 would have 是现在的结果,典型的混合条件。 6. objects。主将从现,从句用一般现在,主语单数加 -s。 7. doesn't finish。第一条件的否定用 doesn't + 原形,不要用 won't。 8. had tested。if 从句在后半句也一样,第三条件从句仍是 had done。 9. were。第二条件里 be 动词书面统一用 were。 10. agrees。provided that 后面同样遵守主将从现。 11. doesn't call。与第 7 题同型,主语 he 用 doesn't。 12. would be。结果落在 now,用 would + 原形,不是 would have been。 13. need。第一条件,从句用现在时;这里是客气的固定说法。 14. had realized。第三条件从句用 had done,注意 realize 是规则动词。 15. arrives。主句 will process,从句用一般现在 arrives。 **C** 1. 分类参考:零条件第 1 题;第一条件第 2、6、7、10、11、13、15 题;第二条件第 3、9 题;第三条件第 4、8、14 题;混合条件第 5、12 题。题量与五类不完全均分,补写第 2 题时把数量补齐,五类各三句。 2. 例:零条件 — Water boils at 100°C.(规律);第一条件 — If the client confirms today, we will ship tomorrow.;第二条件 — If I had a car, I would drive to the site.;第三条件 — If we had checked the figures, we would have avoided the error.;混合条件 — If we had hired a designer in March, the website would look better now. 每句读两遍,重点读 if 从句的动词形式。 **错题怎么处理** 错题只抄三样:原句、正确答案、一句中文判断(「这件事已经过去,从句要用 had done」)。判断句必须写「为什么退到这一步」,不要写「固定搭配」。第二天做新题前先读这三行,读完再动笔。 ## 七、今日输出与自查 - [ ] Day02_条件句15题.txt 已保存,15 空全部填完,五类分类表齐全。 - [ ] 正确率 ≥ 12/15;低于 12 就把错的那一类规则抄一遍,重新做同类三题。 - [ ] 错题本里每条错题都有中文判断句,不只是一句「粗心」。 - [ ] Day02_五类自造句.txt 五句齐全,每句至少 8 词,含 if 或 unless / provided that。 - [ ] Day02_录音.m4a 时长 55—70 秒,五句读完,if 从句的动词形式读清,不吞音。 ## 八、明日预告 Day 3 换到耳朵:听一段改期电话,记六个能直接搬进邮件的表达。今天写的条件句明天会以口语形式出现——电话里没人说 If we had booked earlier,大家说 If we'd booked earlier,缩读之后 had 只剩一个 /d/(≈德·浊)。明天重点听这个 /d/,也要听出对方是用升调还是降调在拒绝。