What Are Conditionals?
Conditionals describe situations where one event depends on another. They are essential in professional English — for proposals, negotiations, planning, and polite requests. English has four main conditional types, each expressing a different degree of reality or possibility.
The Four Conditionals — Interactive Guide
If/When + Present Simple, → Present Simple
If you heat water to 100°C, it boils.
If a client raises a complaint, our team responds within 24 hours.
When demand increases, prices usually rise.
If + Present Simple, → will + Infinitive
If it rains, I will take an umbrella.
If we secure the contract, we will hire three additional staff members.
If you place an order today, we will offer a 10% discount.
If + Past Simple, → would + Infinitive
If I had more time, I would learn Japanese.
If we expanded to Asia, we would need a local distribution partner.
I would appreciate it if you could send the report by Friday.
If + Past Perfect, → would have + Past Participle
If she had studied harder, she would have passed the exam.
If we had launched earlier, we would have captured a larger market share.
If I had been informed sooner, I would have resolved the issue immediately.
Mixed Conditionals
Mixed conditionals combine a past condition with a present result, or a present condition with a past result. They are common in sophisticated professional writing and speaking.
Past Condition → Present Result
Structure: If + Past Perfect, → would + Infinitive
"If we had invested in that technology five years ago, we would be market leaders today."
"If she had taken the management course, she would be running the department by now."
Present Condition → Past Result
Structure: If + Past Simple, → would have + Past Participle
"If he were more organised, he would have met the deadline."
"If the software were more reliable, the project would have launched on time."
Unless, Provided That & As Long As
Beyond "if", professionals regularly use these conditional connectors — and using them correctly signals a strong command of English.
| Word | Meaning | Professional Example |
|---|---|---|
| Unless | = if not | "Unless you confirm by Friday, we will proceed without your input." |
| Provided that | = only if (condition) | "We will sign the contract, provided that all terms are agreed." |
| As long as | = on the condition that | "We can offer flexible hours as long as targets are met." |
| In case | = to prepare for a possibility | "Please keep a copy of all correspondence in case of a dispute." |
| Supposing | = what if (hypothetical) | "Supposing the deal falls through — what is our contingency plan?" |