1. Present simple - does it swim? - does it snow?
Past simple - did it swim? -did it snow?
Present continuous - is it swimming? - is it snowing?
Past continuous - was it swimming? + was it snowing?
Future simple - will it swim? - will it snow?
2. It doesn't eat - it doesn't snow
It didn't eat - it didn't snow
It isn't eating - it isn't snowing
It wasn't eating - it wasn't snowing
It will eat - it will snow 3. 1. It is not raining 2. It doesn't often rain here. 3. It didn't often rain. 4. It won't rain tomorrow. 5. It was bot raining at 10 o'clock yesterday 6. There is not much snow... 7. It doesn't often snow 8. It didn't snow yesterday. 9. It won't snow next sunday.