Use of 'May and Might'

Hello friends it is often confusing for us where to use May and where to use might.Today in this post i will differentiate between these two modals.
Ok lets talk about the modal 'May'
May is used for taking formal permissions for example:May i come in sir.,May i borrow your pen.Remeber for taking formal permissions we usually use 'May' and not 'Can'.The sentence using can may be true but it is not used for taking formal permissions means 'Can' is not used when you are taking permissions from your boss,teacher,or from another peron who is higher in status than you.And for showing politeness or by asking questions politely we use 'May' eg.May i borrow your pen.Second use of May is when talking about of possibilities.When the possibilty of happening an event is greater we use may for example 1) He may come to stay with us. 2)It may rain today.
Now Lets move towards Might.
Might is used in the sentences in which the possibilty of happening an event is very very less.Remeber possibilty is very very less.For example 1)It might rain this yesterday.2)She might be at home.For negative sentences like I might not go to the market.Now lets talk about past possibilities.I might have forgotton my keys at the cafe(Have is a past participle).But i am not sure that i have forgotton my keys at the cafe but this may be the possibility.(If not sure and there is a less possibilty we use might)
hope you have understood the difference between these two.If any query feel free to ask.Keep enjoying friends......