Inference

There are some inference signals in Korea such as teaching to the tongue by finger . That means " I gonna go back to pick up my wallet when I have no money in the shop " But , my Korean friend said that it was informal nowadays , anyway .
Because , we talked about inferences in the RW class , so that is why I'm writing .

Actually , Japan also has some inference signals , so I gonna tell you about it .
First , If someone clean her/his throat in library , we should be quiet . And also , when we eat food , we usually say " Itadakimasu " that means thank farmer for making food or pray animal . As you know , former have to make food for people and also some animal have to die for people , so that is why we said that and pray it .