Conditionals | What's Your IQ

Zero Conditional

The zero conditional is used to express general truths, scientific facts, or things that always happen under certain conditions. It talks about real situations where the result is always true.

Structure: If + present simple, present simple.

Example	Form
If you heat water, it boils.	If + present simple, present simple

If you mix red and blue, you get purple.

If it rains, the ground gets wet.

First Conditional

The first conditional expresses real and possible future situations. It is used to talk about things that might happen if a certain condition is met.

Structure: If + present simple, will + base verb.

Example	Form
If it rains tomorrow, we will cancel the picnic.	If + present simple, will + base verb

If you study hard, you will pass the exam.

If she arrives early, we will start the meeting on time.

Second Conditional

The second conditional is used to talk about hypothetical or unlikely situations in the present or future. It often expresses dreams, wishes, or imaginary events.

Structure: If + past simple, would + base verb.

Example	Form
If I won the lottery, I would travel the world.	If + past simple, would + base verb

If he were taller, he would play basketball.

If I had a car, I would drive to work.

Third Conditional

The third conditional talks about past situations that did not happen and their imagined results. It is used to express regret or speculation about the past.

Structure: If + past perfect, would have + past participle.

Example	Form
If I had studied harder, I would have passed the exam.	If + past perfect, would have + past participle

If they had left earlier, they would have caught the train.

If she had told me, I would have helped her.

Mixed Conditionals

Mixed conditionals combine two different times in one sentence. Usually, the condition is in the past but the result is in the present or future, or vice versa.

Example types:

Past condition with present result
Present condition with past result

If I had studied medicine, I would be a doctor now.

If she were more careful, she would not have made that mistake yesterday.

Conditional Sentence Forms

Conditionals consist of two parts: the "if" clause (condition) and the main clause (result). The verb tenses used in each part determine the type of conditional.

Conditional Type	If Clause	Main Clause	Usage
Zero	Present Simple	Present Simple	General truths
First	Present Simple	Will + base verb	Real future possibilities
Second	Past Simple	Would + base verb	Unreal present/future
Third	Past Perfect	Would have + past participle	Unreal past

Practice Examples

Try to identify the conditional type in each sentence and explain the meaning.

If you heat ice, it melts.

Zero conditional - general truth.

If I see her, I will tell her the news.

First conditional - possible future event.

If I were you, I would apologize.

Second conditional - unreal present situation.

If they had left earlier, they would have arrived on time.

Third conditional - unreal past situation.

Tips for Remembering Rules

Remember that the zero conditional uses present tense in both clauses for facts.
The word "will" usually appears in the main clause of the first conditional to talk about future possibilities.
The second conditional uses the past simple but talks about unreal or unlikely present/future events.
The third conditional always uses the past perfect in the if-clause to talk about imagined past events.
Mixed conditionals combine time frames to show cause and effect across different periods.
Practice by creating your own sentences using each type to reinforce the patterns.