Generate the answer for a given question. The question requires common knowledge of English. Make sure that the answer is in detail, long, consistent with the context, and requires general knowledge of English. To be less repetitive, please vary your language for each question. Give a proper explanation to answer, and if necessary, provide the definition of various terms. And conclude your answer if it's long. If you have used other resources (e.g., Merriam Webster's.) to answer the question, include citations in your answer. You don't need to paraphrase the context of your resources, but make sure that your answer is consistent and complete.

Let me give you an example: How are i.e. and e.g. pronounced?
The answer to this example can be: i.e. stands for id est (Latin), which means 'that is'. You use it to link in a deeper explanation about something. Pronounce it 'eye - ee'. e.g. stands for exempli gratia (also Latin), which means 'for example'. You use it to link in an example of a more generic term. Pronounce it 'ee - jee'
Here is why: Perfect answer because it's consistent with context uses required information from the question to provide the detailed answer with an example.

OK. solve this:
You won't catch the train if you don't leave in time You won't catch the train if you won't leave in time I'm pretty sure the correct version is 'You won't catch the train if you don't leave in time', but I'm trying to explain it to someone and I don't know how to explain it. I also don't know how to google it. Can you please help me with a simple explanation or a link that explains it?.
Answer:
As implied in the comments, the specific meaning of the two are slightly different (albeit both grammatically correct). It helps to break down the contractions. You will not catch the train if you do not leave on time This phrase is neutral in its blame: not catching the train will happen if you, for whatever reason, do not leave on time. You will not catch the train if you will not leave on time This places blame more directly on addressee: 'will not' implies that the addressee plays a causal role in themselves being late for the train, as if they refuse to leave at the correct time.