If a person wants to use an electrical device,, they need to turn it on., If the floor’s dirty,, somebody needs to clean it., Students do better at school if, they have a good night’s sleep., If you’re still hungry,, you can have a piece of fruit., It’s important to wear a raincoat, when it rains., When Freya feels stressed,, she goes for a run with her brother.

p.20 zero conditional

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