Conditionals — first and second

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.

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.

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.

Usage checked 2026-10-20: British Council, verbs in time and if clauses. Local source checks; independent language, answer and learner review pending.