Choose whether the outcomes are impossible, unlikely, even chance, likely, or certain:
You will go to school when it is heavy rain.
If an event is never going to happen then you can describe the probability as impossible
If an event has a small chance of happening then you can use the word unlikely to describe the probability
If an event has a fifty-fifty chance of happening then you can use the word even chance to describe the probability
If an event has a good chance of happening then you can use the word likely to describe the probability.
if an event is definitely going to happen then the probability will be described as certain to happen.
The outcome is unlikely, as the chance of going to school is very less.