Appropriacy

Depending on the situation people use language, it means people choose phrases, sentences and words according to the situation they are facing. It is not the same to talk with friends and talk with authorities from an institution. The register changes to talk with friends or family people tend to use informal language. People talk using colloquial phrases and they feel comfortable and relaxed. However, when people stablish a conversation with people who do not know the register changes into formal language. People use polite phrases to communicate. 

Also, there is a neutral register which does not show to much casulness and  it is not too polite. Thus, the process to choose the correct register that matches a situation is appropriacy. 

Many times it could be difficult to choose the correct register at speaking or writing in English. However teachers in the classroom can help students to recognize and apply the approprite level of language according to each situation, for example:

- Make students to watch videos with different register levels.

- Give students chunks and make them recognize in what  register  level they are  and when to use them. 

• Could you do me a favor?
• Please do me a favor.
• Do me a  favor. 

Therefore, it is necessary to know the levels of formality in language to communicate with others propperly and manage the different situations correctly. 

REFERENCES: 

•  Cambridge dictionary. Retrieved from http://dictionary.cambridge.org/
• Mary Spratt, A. P. (2011). The TKT Teaching Knowledge Test Course Modules 1, 2 and 3. United Kingdom: Cambridge University Press