Might, May, Will probably (Modals).

Sometimes we talk about the future without being sure.
This lesson shows how to express different levels of possibility.

1.Talking About Uncertain Futures

We use modal verbs to show how likely something is.

2.Using Might, May, and Could

Might and may show possibility and uncertainty.

Key points:

• Might often suggests a slightly lower probability than may, but in most cases they are interchangeable.
• Both may and might are used when we are not sure about the outcome.

Do not confuse possibility may with permission may: May I come in? asks for permission; She may come in later means perhaps she will come in later.

Could can also express a possible future event or one possible explanation:

• The train could be late because of the snow.
• We could have a storm tonight.

Note: “May” is slightly more formal than “might” and is often used in written English. In many possibility statements, may, might, and could overlap.

2.1Negative possibility

May not and might not both mean that something is possibly not true or possibly will not happen. May not can sound slightly more formal, while might not can sound a little more tentative.

• The shop may not be open.
• The shop might not be open.

Be careful with can’t/couldn’t: they often express impossibility or inability, not merely a negative possibility. Compare She might not come (perhaps she will not come) with She can’t come (she is unable or unavailable).

May not can also mean that permission is refused: You may not enter means “You are not allowed to enter,” not “Perhaps you will not enter.” Use the context to distinguish this permission meaning from the possibility meaning above, just as you do with positive may.

3.Using Will Probably

Will probably is used when the speaker expects something to happen — it is more certain than may/might, but still not 100%.

Word order: will probably + verb is most common. probably will + verb is also possible (often for emphasis). In positive sentences, probably usually follows the auxiliary; in negative sentences, it comes before the negative auxiliary: She will probably come / She probably won't come.

She will probably be late. / She probably will be late.

Negative: She probably won’t come. (avoid using won’t probably come.)

4.Comparing levels of certainty

How certain?	Form	Example
very certain	definitely / certainly	She will definitely call.
likely	will probably	She will probably call.
possible	may / might / could	She might call.
unlikely	probably won't	She probably won't call.
very unlikely	definitely won't	She definitely won't call.

In many everyday situations, may and might have the same meaning; context is more important than the exact word.

4.1Maybe, perhaps, and possibly

Maybe and perhaps often come at the beginning of a sentence: Maybe she'll call. / Perhaps she'll call. Possibly is also possible but more formal. Compare Maybe she'll call with She may call. Probably normally goes in the middle, near the auxiliary: She will probably call.

5.Possibility About the Past

Use may / might / could + have + past participle when you are not sure what happened in the past.

• Lena may have missed the bus.
• They might have taken the wrong road.
• He could have left his phone at work.
• Maya might not have seen your message.

Here, could have means that something was a possible explanation. In other contexts, it can describe an opportunity that was not used: I could have gone, but I stayed home.

Use might have been + -ing when you think an activity was in progress at a particular time: At eight, Lena might have been waiting for the bus. This focuses on the possible activity in progress, not just its completed result.

6.Questions About Possibility

Direct modal questions are possible, although might can sound formal:

• Could the train be late?
• Might the meeting finish early?

In everyday conversation, we often ask Do you think … will …? instead of putting probably in a direct question:

• Do you think she will call tonight?
• Are they likely to arrive before eight?

Be likely to also means that something is probable: They're likely to arrive late. We can also say It's likely that they'll arrive late.

7.Common Mistakes to Avoid

Each modal has its own rule below.

• Do not add to after a modal: She might to come is incorrect; say She might come.
• Do not use two modal verbs together: It will might rain is incorrect; say It might rain or It will probably rain.
• Do not use May …? to ask about possibility in modern English. May I come in? asks for permission, but use Do you think she will be late? to ask about probability. This is the same permission/possibility contrast from section 2.

After a modal, use the base verb. For a past possibility, use modal + have + past participle.

8.Key Takeaway

• Might / may / could → uncertain possibility.
• Will probably → expected but not certain.
• Might / may / could have + past participle → uncertainty about the past.