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Conditionals — first and second
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If … , then …
- A conditional connects a condition with a result, decision or offer. It does not promise that the condition will happen.
- Here we practise two common patterns: an open future possibility and an imagined situation viewed as more remote.
- Outcome: interpret those viewpoints and write a useful conditional message. Start with present simple and future reference. Starting check: does If the bus is late, I’ll walk tell you that the bus will be late? It leaves that open.
If it rains tomorrow, my umbrella will choose to stay at home.
First conditional — an open possibility
- A common pattern is
if + present simple, will + base verb: If it rains, we will stay home. The present form refers to a possible future condition. - The result can also use a modal or an instruction: If you need help, you can call me. If the door is locked, use the side entrance.
- If you study, you’ll pass expresses the speaker’s prediction; its grammar does not prove that studying guarantees a pass.
Practise the first-conditional will pattern: If it rains, we ___ at home. Choose the result containing will.
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Will stay supplies the requested will + base-verb result. Stay can describe a habitual result in another context; it is not the requested will pattern. A conditional prediction is not proof that an outcome is guaranteed.
For an ordinary open future weather condition, is this the standard pattern? “If it will rain tomorrow, we will stay home.” (Will here is intended only as a future marker.)
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For that ordinary future condition use “If it rains tomorrow, we will stay home.” This is not a ban on will after every if: willingness and indirect whether-questions have different patterns.
Translate into English: 如果下雨,我们就待在家里。
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The reference uses a common open-future condition and will result. Preserve the conditional meaning; other natural wording can communicate it too.
Second conditional — imagined or more remote
- A common pattern is
if + past form, would + base verb: If I had more time, I would travel. The past form here marks distance from reality, not a past date. - It can describe an imagined present or future: If I moved next year, I would need a new job. It does not assign a numerical probability.
- If I were you, I’d rest is a conventional advice pattern. Were works with all subjects in this hypothetical use; was also occurs with singular subjects, especially informally.
First or second conditional?
Recognise the open-future and remote-hypothetical patterns in these written examples; they express viewpoints, not guaranteed outcomes or measured probabilities.
Second conditional: If I ___ you, I would rest. (use the past of “be”)
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Were is conventional in “If I were you” and works with all subjects in this hypothetical use. Singular was also occurs informally and is accepted here. The past form marks an imagined viewpoint, not a past date.
unless — except if
- You’ll be late unless you hurry means you’ll be late if you don’t hurry.
- Check the whole meaning rather than deleting or adding not mechanically: I’ll lend it to you unless you don’t want it has a meaningful negative condition — not wanting it is the exception.
- For an ordinary future condition, use a present form after unless. This is a useful pattern, not a rule banning every negative clause.
Check meaning before changing a form
- For the ordinary condition of having time, write If I have time, I’ll help, rather than adding a future will inside that condition.
- But If you will wait here, I’ll find the manager can use will for willingness. I wonder if it will rain is also grammatical: its if introduces an indirect question, meaning whether.
- Compare If I knew the answer, I would tell you with If I know the answer, I’ll tell you. The first presents knowing it as remote; the second leaves it open. Neither form alone proves what the person actually knows.
Match the familiar if-clause/result combinations shown here. These are model patterns, not a claim that a condition can take only one result form.
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The examples pair an open-future prediction with will, hypothetical advice with would and a general fact with present simple. Other coherent modal or imperative results can occur in other messages.
The speaker presents knowing the answer as an imagined, remote situation. Which option uses the standard second-conditional pattern for that meaning?
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If I knew … I would tell … is the requested remote pattern. Knew here marks the imagined viewpoint, not an earlier date. The task does not ban willing/polite would in every other if-clause.
- Read the condition and the result; distinguish an open possibility from an imagined remote one.
- The familiar first/second patterns are useful starting frames. Other modals, instructions and meanings of will also occur.
- Later recall: invent a different travel delay and write an open condition plus a backup action. Explain why the delay is not asserted as fact. Revisit the fresh tasks from memory, then study reported speech to pass on a changed plan accurately.
Usage checked 2026-10-20: British Council, verbs in time and if clauses. Local source checks; independent language, answer and learner review pending.
Imagine an unreal situation. Write one sentence with the second conditional (If + past, would + base verb).
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Example: “If I won the lottery, I would travel the world.”
A workshop message says: “If the projector fails tomorrow, we can use the printed diagrams.” Which reading preserves what the message actually says?
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If leaves the future failure open; can gives an available response. Neither a failure nor diagram accuracy is established. If you read the condition as a fact or guarantee, underline if and can, then rewrite the message as an open possibility before trying a new backup plan.
A friend plans an outdoor lunch, but the weather is uncertain. Write a two-sentence English message: give one possible condition and a practical backup action, then imagine a different location you could choose if you had unlimited space. After comparing, revise one unclear condition or verb frame. Invent ordinary details; no proficiency score is assigned.
Compare the intended meaning and the relevant clause/form choices. Revise one supported issue; this local self-review does not award correctness or proficiency.