Learn expressions as situations, not equations
Instead of asking which Korean word equals each English word, learn what Korean speakers commonly say in the same situation. This helps with greetings, requests, reactions, and service encounters.
The meaning changes with context.
Subjects are often omitted
Korean frequently drops subjects or objects when everyone knows what is being discussed. Repeating 저는 or 당신은 in every sentence can sound unnecessarily explicit.
The speaker can be understood without 저는.
Start polite, then learn the relationship
For beginners, -요 style is a useful everyday default. Casual speech is not simply a shorter version of polite Korean; it also reflects closeness, age, and social context.
Use Korean request patterns instead of English word order
A long English request often becomes a short Korean expression because politeness is carried by the ending and the situation. Noun + 주세요 works for many service requests. Verb + -아/어 주세요 asks someone to do an action. Adding 좀 can make an everyday request feel less abrupt, but it does not excuse an inappropriate speech level.
Contractions are normal, not careless Korean
Everyday Korean commonly contracts 이것, 그것, and 무엇 in predictable ways. These forms are still grammatical; they simply fit spoken rhythm better. Use the full forms when a formal document or careful emphasis calls for them, and expect the shorter forms in conversation.