The formal form -(으)ㅂ시다 let’s you make suggestions or proposals to do something to others. It is a form with a few restrictions on when it is proper to use.
The form -(으)니까 allows you to express the reason or cause of something. Or you can use it to express your discovery after performing a certain action.
In Korean grammar, you use -(으)러 to express the purpose of you going somewhere. Therefore, the second clause of the sentence always has a verb of movement.
Expressing the purpose of your actions is easy with the form -(으)려고. However, keep in mind that this form does come with a few restrictions.
The verb ending -(으)려고 하다 you use to express the intention or plan of the subject. However, he or she has yet to act upon said plan or intention.
The particle -(으)로 designates the direction of movement or the means with which you do a certain action. The particle is a must know in Korean grammar.
The Korean verb ending -(으)면서 allows you to easily say two actions performed by the same subject happened simultaneously. It is similar to 동안.
The most common imperative in Korean is the form -(으)세요. You use it to place orders, to make requests, give directions, etc. So it is important to know.
-(으)시겠어요 is a formal and polite form to ask after someone’s preferences or to make give a suggestion. It has within itself the honorific marker -(으)시-.
-(이)나 is the particle you use to give a list of choices between two or more items. It can also express the number of things is greater than expected.