Put together modals of deduction and speculation must, might, could, may, can't and have and then a past participle verb to deduce and speculate about an action that occurred in the past. It must have rained last night. She might / might not have registered for the seminar.

When we use may might could?

When you want to talk about possibilities, use could, may and might. They all mean the same thing and we use them all to talk about things that are possibly true now and things that will possibly happen in the future. If you think things are possibly NOT true or NOT certain, say 'might not' or 'may not'.

Could May might example?

Examples

They might attend the awards ceremony tomorrow night. He could call you back tonight. We could choose a new color of paint for the bedroom. I might join you if I finish early.