Modal for requests: can, could, may

Hm, now modals is plural noun. They are formed for requests.

They are in the focus here, nothing more, only they are. How to use them for requests?

Can, could, may ... 

Order

They are sorted by frequensy of using them ... hm. But I know that can is about ability when it for describe verb. It's only key for make request or to say easy, question.

I don't know about could now, formally, I didn't learn it. But I know that could is between can and may.

Possible for any place if I don't know how to be ... be or not to be. Yes, good question. When I don't know how to be, why I'm in this place?

Could

Hm, may be it is no bad measure for understand that I'm not on the place that is right for me.

May

May is like to be formal or polite with accent for it.

Can for give permissions ...

Hm... Can is about ability, when I say: Yes, you can. I say that: I think you can do this.

How to #1

• Can it's for ask and get permission. It looks good, but it say that when I ask, I don't know about my ability;
• Could for get permission, can for take. When I'm don't know that I need it ... Yes, if I can or can't,
  
• May for get, can for take permissions ... It's very polite, when I like it, when I can or I can't ...
  
• Can for ask, for ask polite ...
  
• Could for ask, when I don't know that I need it colpletely ...
  
• May for ask, for ask very polite ...
  
• Can for ask to do something. When I need to know that he or she can do it.
  
• Could for ask to do something, when I don't know that I need it ... 

How to #2

Could is the past of can mean of ability, no of person who was able to ... . May be could is right when I know about ability that was right, but don't sure now.

But I know that ability in the past is very reliable way to check, ... When I ask could, I must understand that this ability is allowed in the past.

Please

I can use it for set accent that I really need or need an attention of anibody. ...

Picture, example

• Claudia, a holiday: could for safari, can for take friends with.
  
• Charles, a car: can for take car model, could for take answer about possibility (yes/no).
  
• John, a job: could for a job in circus, may for show his video.
  
• Rita, a sister: may for a sister, could for her hair and eyes color.

I think red include mistakes, but no one examples with can with mistake. Can I try to find who can without limits?

 

How to #3

• I'm using could if I have a doubt, but know it was right ability in the past.
  
• I'm using can when it's about present.
• I'm using may when it's very polite, official, difficult, include large amount of experience.