Use the first conditional for real or possible future situations, as in if it rains, I will stay home, and the second conditional for unreal or hypothetical situations, as in if I won the lottery, I would travel the world. Both clauses must belong to the same conditional, and the two forms should never be mixed.
Grammar Rule
Both clauses must belong to the same conditional; the choice depends on how likely or real the speaker considers the situation.
First vs Second Conditional: Rules and Examples
| Conditional | Structure | Example |
|---|---|---|
| First (real/possible) | if + present, will + base verb | If it rains, I will stay home. If she studies, she will pass. |
| Second (unreal/hypothetical) | if + past, would + base verb | If I won the lottery, I would travel the world. If I had wings, I would fly. |
Remember: first conditional for real possibilities; second conditional for unreal situations — don’t mix the two forms.
Practice Test
Instructions
Answer each question in the test below choosing correctly between the first and second conditional. You will get a new random set of questions every time you retake the test, plus a downloadable results summary with your name and score at the end.
First Conditional vs. Second Conditional
Click «Start the test» to begin right away — no signup required. You can get a personalized certificate with your name and score at the end, if you want one.
Frequently Asked Questions
What is the difference between the first and second conditional?
The first conditional describes real or possible future situations, as in if it rains, I will stay home, while the second describes unreal or hypothetical ones, as in if I won the lottery, I would travel the world.
Can you mix the first and second conditional in one sentence?
No, both clauses must belong to the same conditional, so if starts with the past simple, the result clause must use would, not will.
How do you decide which conditional to use?
It depends on how likely or real the speaker considers the situation to be, not on the actual facts of the world.
Can the second conditional refer to the future?
Yes, it can refer to unlikely present or future situations, as in if I had wings, I would fly.