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Teacher cue
B1 · English Grammar

First
Conditional

If it rains tomorrow, I will stay at home.

if + present will + base verb
The idea

A real, likely future situation

Used for specific possible situations and their probable results — not general truths (that's zero conditional).

Examples

If it rains tomorrow, I will stay at home.

If you study hard, you will pass the exam.

The structure

if + present simple

→ will + base verb

Order is flexible — comma if "if" comes first.

Word order

Either order works

If it rains, I will stay at home. (if-clause first → comma)
I will stay at home if it rains. (result first → no comma)
She will miss the bus if she doesn't hurry.
Beyond "will"

Replace will with other modals

might
uncertainty

If it's warm, we might go to the beach.

can
possibility

If you finish early, you can leave.

should
advice

If you feel ill, you should see a doctor.

In real sentences

See it in action

If he doesn't apologize, she won't forgive him.
Will you come to the party if I invite you?
What will you do if you miss the flight?
⚠ Watch out

Common mistakes

If it will rain, I will stay home.

If it rains, I will stay home.

If you will study hard, you will pass.

If you study hard, you will pass.

I will to call you if I'm late.

I will call you if I'm late. (no "to")

She wills miss the bus if she's late.

She will miss the bus. (will never takes -s)

Now it's your turn

Let's
practice.

Say the answer out loud — then tap to check.

Practice 1
tap the blank to reveal

Fill the gap

If you(not / hurry)you'll miss the train.
I(help)you if you need it.
If it(rain), we'll stay inside.
(will)you call me if you arrive late?
If she(not / apologize)he won't forgive her.
Practice 2
tap a sentence to reveal the error

Spot the mistake

If it rainsA tomorrow, we will canceledB the picnic andC stay atD home instead.

Bwill canceled → will cancel

✓ will + base verb

If the weather isA good on Sunday, my parents will driveB us to the coast, whereC my aunt liveD.

Dlive → lives

✓ my aunt → lives

If she will missA the train, she won't arriveB beforeC midnight, andD we will have to wait.

AIf she will miss → If she misses

✓ no will in the if-clause

Practice 3
tap to reveal a model answer

Complete the sentence

If it rains tomorrow,
If you study hard,
I'll be happy
What will you do
Speak & write

Your turn

Use if + present simple, will/can/might + base verb.

What will you do if it rains this weekend?
If you have free time tonight, what will you do?
What might happen if you don't study for your next test?
Give a friend some advice using "if ... you should ..."
Recap

Remember this

If-clause
present simple
Result clause
will / can / may / might + base
Use
real, likely future situations
Never use
"will" in the if-clause

Even talking about the future, the if-clause stays present simple.

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