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Teacher cue
B1 · English Grammar

Future Possibility
and Certainty

I might be late. I'll definitely call you.

may / might / could probably / definitely
The big picture

A scale of certainty

may / might / could
You could live with a friend.
~30–50%
will probably
I will probably get a new job.
~70–80%
will definitely
I will definitely go.
100%
Possibility

May, might, could

I might still be at home next year. (possible, not sure)
You could live with a friend. (possible option)
She might not come to the party. (possibly won't happen)
Near Certainty

Probably — word order matters

I will probably get a new job next year. (after will)
I probably won't have enough money. (before won't)
She will probably be late.
Full Certainty

Definitely — same word order rule

I will definitely miss them! (after will)
He definitely won't forget your birthday. (before won't)
⚠ Watch out

Common mistakes

She might to come tomorrow.

She might come tomorrow.

I will go definitely.

I will definitely go.

I probably won't to pass.

I probably won't pass.

She could to live with a friend.

She could live with a friend.

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

I'm not sure, but I(maybe / travel)abroad next year.
I'm almost sure — I(almost sure)pass the exam.
I'm 100% sure — I(100% sure)come to your party.
She(almost sure: no)finish on time.
He(100% sure: no)forget your birthday.
Practice 2
tap a sentence to reveal the error

Spot the mistake

The sky is gray, soA it might rainsB later, butC the forecast saysD it will be dry.

Bmight rains → might rain

✓ modals take the bare infinitive

The results mayA arrive tomorrow, butB the committee hasn'tC finished to discussD the proposals.

Dto discuss → discussing

✓ finish + -ing

It will be definitelyA cold tonight, soB take a coat andC maybeD a scarf.

AIt will be definitely → It will definitely be

✓ the adverb goes between will and the verb

Practice 3
tap to reveal a model answer

Complete the sentence

I might travel this summer,
I will probably finish the project
She will definitely
We probably won't
Speak & write

Your turn

Choose the right level: might, probably, or definitely.

What will you definitely do this weekend?
What might you do if you have free time tomorrow?
Where do you think you'll probably be in five years?
What will you definitely NOT do this year?
Recap

Remember this

may / might / could
+ base verb (no "to")
will probably
almost certain (~70-80%)
will definitely
100% certain
Word order
after will, before won't

Probably and definitely: after will, before won't — every time.

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