"Will" is the modal verb that expresses certainty. It works the same as "may", the difference being that "may" expresses possibility rather than certainty. Both may be used to talk about the future: "I will play football tomorrow." "I may play football tomorrow." But like "may", "will" is not inextricably linked to the future. You can talk about the future without "will", and you can use "will" without talking about the future. The same is true for "may". Certainty is especially helpful when you want to say that you know something will definitely happen, and that is the reason people associate "will" with a so-called "future tense". "Will" is useful for describing habits because habits are hard to stop. They have a persistence. There is a certainty that they will happen over and over, and "will" gives you that. When you say "He will hold his knife and fork wrong", you express a certainty about the recurrence of this habit. You can also say, "he holds his knife and fork wrong". There's not that much difference, really. "Will" works better if you add a word like "often" to make it clear that you are not talking about the future: "Often he will hold his knife and fork wrong".

Hi, actually as for the English grammar Rules, 'will' is used for the future happenings. But there are exceptions even in grammar rules so in some grammarians' point of view we can use will for the near present as is for the near future; conversationally for the habits as well.

So can you tell me in which situation we use will and when present simple?