Everybody should know about some general and common good manner. So just have a look to this pic and learn good manners. You can enhance your talking and writing with these manners. If you want any grammatical help then you can take help from here.
This is true. I am a middle born and that is kinda true about me. same for my bro another middle born. and my oldersister first born. the only one that is wrong is my little sister "last born" she isn't like that really.