about weather forecast and weather report

please tell details about weather forecast and weather report.I don’t know very well about these words.

I would also want to know about "get and have’. Plz. explain where and how can use this.

Weather forecasts (a guess at future weather) and weather reports (information about recent weather, including forecasts) occur on TV at regular intervals in every country that has TV.

The general subject of ‘get’ and ‘have’ is far too broad to discuss here. Your dictionary should have a long list of definitions and idioms in which those 2 verbs figure. If you have specific questions, please ask them.