完整英语语法指南

First conditional 英语第一条件句：结构、例句和练习

First conditional 用来表达未来真实可能发生的情况：计划、结果、提醒和可能的决定。

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当 first conditional 变得自然时，未来不再是逐词翻译，而是清晰的决定。

快速答案

最常见的 first conditional 结构是 If + present simple, will + infinitive。它把真实条件与可能发生的结果联系起来。

If + present simple+will + infinitive
If I study today, I will pass the test.如果我今天学习，我会通过考试。
含义结构例句对比练习FAQ

英语 first conditional 是什么？

First conditional 描述现在或未来可能出现的条件，以及很可能发生的结果。它适用于真实的决定，例如学习、预订、打电话、练习、提醒或改变计划。

它与 zero conditional 不同，不表示普遍规律；也与 second conditional 不同，不是在想象不太可能的情况。First conditional 讨论的是真实可能性。

真实未来

一个可能的条件

If it rains tomorrow, we will stay at home.present simple + will
决定

一个可以选择的结果

If I finish work early, I will call you.计划 + 结果
提醒

一个可能发生的后果

If you do not practise, you will forget the structure.条件 + 结果

First conditional 结构

基本公式简单而实用：if 条件分句使用 present simple，结果分句使用 will。两个分句可以调换顺序，而不改变含义。

类型 公式 例句
肯定句 If + 主语 + present simple, 主语 + will + 动词原形 If I study today, I will pass the test.
否定句 If + 主语 + present simple, 主语 + will not / won't + 动词原形 If she does not practise, she won't improve.
疑问句 Will + 主语 + 动词原形 + if + 主语 + present simple? Will you call me if you arrive early?
Unless Unless + 主语 + present simple, 主语 + will + 动词原形 Unless we leave now, we will be late.
情态结果 If + 主语 + present simple, 主语 + can/may/might + 动词原形 If you finish the exercise, you can check the answers.

关键规则: 在条件分句中，if 后不要使用 will。应说 If I have time, I will practise，不要说 If I will have time...

First conditional 什么时候使用？

First conditional

计划

当未来行动取决于真实条件时使用。

If I have time tonight, I will review the lesson.
First conditional

后果

用来说明条件满足后很可能发生什么。

If she misses the bus, she will arrive late.
First conditional

提议和承诺

用明确的决定回应一个条件。

If you need help, I will explain it again.
First conditional

提醒和警告

清楚说明某个行动可能带来的结果。

If you forget the comma, the sentence will still be clear.
First conditional

Unless

当含义是 if not 时使用 unless。

Unless you practise, you will not feel confident.
First conditional

Will 的替代形式

使用 can、may 或 might 调整确定程度。

If you finish early, you can join the class.

First conditional 例句

通过这些例句，把 first conditional structure、first conditional examples、first conditional sentences 与真实语境中的含义联系起来。

First conditional 例句

  • If I wake up early, I will go for a walk.
  • If we save enough money, we will travel in summer.
  • If you send the email now, they will answer today.

First conditional 句子

  • If it is sunny, we will eat outside.
  • If he studies grammar, he will write better.
  • If they invite us, we will go to the meeting.

First conditional 疑问句

  • What will you do if it rains?
  • Will she join the class if she has time?
  • Where will they stay if the hotel is full?

用于练习的 first conditional 句子

If I practise every day, I will speak with more confidence.If you learn the rule today, you will recognise it in films, classes and conversations.If a sentence feels real and possible, first conditional is usually the safest choice.

Zero, first, second and third conditional 的区别

关键不是死记名称，而是判断你表达的是普遍事实、真实可能性、想象中的假设，还是过去已经不可能实现的结果。

Zero conditional

普遍事实

If you heat water, it boils.
First conditional

真实的未来可能性

If I study today, I will pass the test.
Second conditional

想象中的情况

If I studied every day, I would speak better English.
Third conditional

过去不可能实现的结果

If I had studied, I would have passed the test.

First conditional 常见错误

大多数错误来自逐字翻译。即使含义指向未来，英语在 if 后仍使用 present simple。

First conditional 英语第一条件句：结构、例句和练习

1错误If I will study, I will pass.
2正确If I study, I will pass.
3提示在 if、unless 和 when 后使用 present simple。
4含义问问自己：这在未来是真实而且可能的吗？

First conditional exercises：带答案练习

练习基本结构、否定句、疑问句，以及 unless、when、can 或 may 等替代形式。目标是不再逐字翻译，而能自然使用 first conditional。

练习 1

  1. If I _____ (finish) early, I _____ (call) you.
  2. She _____ (not improve) if she _____ (not practise).
  3. If it _____ (rain), we _____ (stay) at home.
  4. What _____ you _____ (do) if you _____ (miss) the bus?

答案: finish / will call; will not improve / does not practise; rains / will stay; will / do / miss.

练习 2

  1. Unless you _____ (study), you _____ (forget) it.
  2. If they _____ (arrive) early, they _____ (can join) us.
  3. Will you help me if I _____ (need) it?
  4. If he _____ (be) tired, he _____ (not go) out.

答案: study / will forget; arrive / can join; need; is / will not go.

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与 first conditional 相关的英语语法路径

巩固条件句主题结构，并把本课与能帮助你造出更准确句子的语法内容联系起来。

继续学习：复习条件句、动词时态和代词，让 first conditional 在对话中变得自然。

GrammarEnglish grammarAdjectivesAdjectivesAdjectivesComparative adjectivesAdjectivesDemonstrative adjectives: this, that, these, thoseAdjectivesIrregular adjectivesAdjectivesPossessive adjectives in EnglishAdjectivesSuperlative adjectivesAdverbsAdverbs of degreeAdverbsAdverbs of timeConditionalsConditionals in EnglishConditionalsZero conditional in EnglishConditionalsFirst conditional in EnglishConditionalsSecond conditional in EnglishConditionalsThird conditional in EnglishPronounsHow to use whomQuantifiersDifferences between a lot, a little and a fewPossessivesPossessives in EnglishPossessivesSaxon genitivePractical grammarImperative in EnglishConnectorsPrepositions in EnglishPronounsPronouns in EnglishPronounsIndefinite pronouns in EnglishPronounsObject pronouns in EnglishPronounsPersonal pronouns in EnglishCommunicationGreetings in EnglishGrammarSingular and plural in EnglishQuantifiersSome and anyVocabularyCompound nounsQuestionsWh questions

First conditional 常见问题

First conditional 的结构是什么？

常见结构是 If + present simple, will + infinitive。

什么时候使用？

用于真实或可能的条件及其未来结果。

可以用 can, may 或 might 吗？

可以，用来表达能力、许可或可能性。

和 zero conditional 有什么区别？

Zero conditional 表示普遍真理；first conditional 表示具体的未来可能性。

可以用 unless 吗？

可以，unless 的意思是 if not。

通过真实练习掌握 first conditional

掌握公式，观察例句，纠正常见错误，并用它表达英语中的真实决定。

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