FIRST OR SECOND CONDITIONAL? EXERCISE 1 (ESL)
level: Intermediate (B1/B2)
Both the first and second conditional describe hypothetical situations, but they differ in how probable those situations are. The first conditional uses if + present simple + will for real or likely situations; the second uses if + past simple + would for imaginary or unlikely ones. The grammar review below explains the key difference with clear examples.
Grammar review
First conditional vs second conditional — structures and meanings
Both the first and second conditional describe situations and their possible results, but they differ in how likely or real the situation is.
FIRST CONDITIONAL
Structure: If + present simple, will + base verb
Use for real, possible, or likely situations — the condition could genuinely happen.
“If it rains tomorrow, we will cancel the picnic.” (rain is possible)
“If you study hard, you will pass the exam.” (realistic outcome)
“If I end up going, I’ll call you.” (genuine possibility)
SECOND CONDITIONAL
Structure: If + past simple, would + base verb
Use for unreal, hypothetical, or unlikely situations — the condition is imaginary or not expected to happen.
“If I won the lottery, I would travel the world.” (unlikely)
“If she were taller, she would play basketball.” (not currently true)
“If he exercised more, he’d have bigger muscles.” (hypothetical)
Key rule: Never use would in the if clause of either conditional.
✗ If I would have more time… ✓ If I had more time…
Both the first and second conditional describe situations and their possible results, but they differ in how likely or real the situation is.
FIRST CONDITIONAL
Structure: If + present simple, will + base verb
Use for real, possible, or likely situations — the condition could genuinely happen.
“If it rains tomorrow, we will cancel the picnic.” (rain is possible)
“If you study hard, you will pass the exam.” (realistic outcome)
“If I end up going, I’ll call you.” (genuine possibility)
SECOND CONDITIONAL
Structure: If + past simple, would + base verb
Use for unreal, hypothetical, or unlikely situations — the condition is imaginary or not expected to happen.
“If I won the lottery, I would travel the world.” (unlikely)
“If she were taller, she would play basketball.” (not currently true)
“If he exercised more, he’d have bigger muscles.” (hypothetical)
Key rule: Never use would in the if clause of either conditional.
✗ If I would have more time… ✓ If I had more time…
Choose the correct verb form to complete each conditional sentence.
CHECK OUT OUR OTHER CONDITIONAL EXERCISES:
The first conditional 1 (B)
The first conditional 2 (B)
The first conditional 3 (B)
The second conditional 1 (I)
The second conditional 2 (I)
First or second conditional? 1 (I)
First or second conditional? 2 (I)
The third conditional 1 (I/A)
The third conditional 2 (I/A)
Conditional tenses (mixed) 1 (I)
Conditional tenses (mixed) 2 (I)
Conditional or future? 1 (I)
Conditional, future, or present? 1 (I)
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The first conditional 1 (B)
The first conditional 2 (B)
The first conditional 3 (B)
The second conditional 1 (I)
The second conditional 2 (I)
First or second conditional? 1 (I)
First or second conditional? 2 (I)
The third conditional 1 (I/A)
The third conditional 2 (I/A)
Conditional tenses (mixed) 1 (I)
Conditional tenses (mixed) 2 (I)
Conditional or future? 1 (I)
Conditional, future, or present? 1 (I)
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