What is the First Conditional?

The first conditional is used to talk about real and possible situations in the future. It follows this structure:

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

Now, let’s add unless into the mix.

What Does “Unless” Mean?

Unless means if not. It introduces a condition where something will only happen if the condition is not met.

• Example: Unless you study, you will fail the test.
  (If you don’t study, you will fail the test.)

Forming the First Conditional with “Unless”

To use unless in the first conditional, follow this structure:

Unless + present simple, will + base verb

Here’s how it works step-by-step:

1. Start with unless.
2. Use the present simple verb after unless to describe the condition.
3. Use will and the base verb in the main clause to describe the result.

Examples of “Unless” in First Conditional Sentences

• Unless you hurry, we will miss the bus.
  (If you don’t hurry, we will miss the bus.)
• You won’t pass the exam unless you prepare well.
  (You won’t pass the exam if you don’t prepare well.)
• Unless it stops raining, we won’t play soccer.
  (If it doesn’t stop raining, we won’t play soccer.)

Key Notes to Remember

1. Negative Meaning
   • Unless always has a negative implication.
   • Unless you call me, I will assume you’re not coming.
     (If you don’t call me, I will assume you’re not coming.)
2. No Double Negatives
   • Avoid using negative verbs after unless.
   • ❌ Unless you don’t hurry, we will miss the train.
   • ✅ Unless you hurry, we will miss the train.

Practice Time!

Fill in the blanks with the correct form using unless:

1. ______ you work harder, you _______ not achieve your goals.
2. We _______ have a picnic _______ the weather improves.
3. _______ Sarah apologizes, I _______ forgive her.

Answers

1. Unless you work harder, you will not achieve your goals.
2. We will not have a picnic unless the weather improves.
3. Unless Sarah apologizes, I will not forgive her.