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We use MUST when we are 100% sure that it is true.Example: Croak, croak!
It must be a frog.
We use MAY, MIGHT or COULD when we think that something is possible.
Example: I don’t know the time, but it might be late.
We could try to open it. We may open it.
We use CAN’T when we think that something is impossible.
Example: You can’t be my brother. I am the only child in my family.
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Do you know Sherlock Holmes? Click on the image and learn how he worked on deduction.
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Do you want to practice the use of these modal verbs?
Game 1
Game 2
Game 3
Games 4
Game 5