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Zero, First, Second & Third Conditionals — structures, uses, and common errors
Conditionals are sentences that express a condition and its result. They describe situations that depend on something else happening. Every conditional has two parts: the if-clause (condition) and the main clause (result).
Example: If it rains (condition) → we stay inside (result). The comma is used when the if-clause comes first.
| Type | If-Clause | Main Clause | Use |
|---|---|---|---|
| Zero | If + present simple | present simple | General truths / facts |
| First | If + present simple | will + base verb | Real future possibility |
| Second | If + past simple | would + base verb | Hypothetical / unlikely |
| Third | If + past perfect | would have + past participle | Unreal past / regret |
Zero: If you heat water to 100°C, it boils. (always true)
First: If she studies hard, she will pass the exam. (real possibility)
Second: If I had more time, I would travel the world. (imaginary now)
Third: If they had left earlier, they would have caught the train. (past regret)
Unless = if … not: Unless you hurry, you will miss the bus.
As long as / Provided that: You can borrow the car as long as you drive carefully.
Mixed Conditional (past condition + present result): If I had studied medicine, I would be a doctor now.
DON'T say: If I will go to Paris… → Correct: If I go to Paris, I will visit the Eiffel Tower.
DON'T say: If she would study more… → Correct: If she studied more, she would get better grades.
DON'T say: If they had went earlier… → Correct: If they had gone earlier, they would have arrived on time.
15 conditional sentences • Level B1
🔀 Put the sentences in order | Conditionals in Context | English B1
Listen · Repeat · Practice — 25 conditional sentences in natural context
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B1 English · Conditionals
B1 English · 15 Conditional Sentences
B1 English · 12 Conditional Sentences
B1 English · 25 Conditional Sentences
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