I think '최선을 다하다' can be the equivalent of 'to do your best'. 최선 the one's best 다하다 to make every effort So if I can give you some examples of Korean proverbs related to the expression of 최선을 다해 노력하는 것 (to give all the effort all you can be), it would be; 1) 공든 탑이 무너지랴 loosely translated, A tower would never collapse if it was built with effort. (Hard work always pays dividends.) 2) 무쇠도 갈면 바늘이 된다 word-for-word, Strike until the iron becomes a needle.(Constant dripping wears away the stone.) 3) 밤이 깊어질수록 새벽이 가까워 온다 (Dawn comes in the deepest darkness.) Hope it helps you!:)

닦다 to cultivate, train, practice 공덕 a charity, Buddhist merit, merit (공로 공 功; meritorious deed) and virtue (덕 덕德) 공덕(을) 닦다 to undergo spiritual training  -으러 가다/오다 to go/come to do sth 공덕(을) 닦으러 오다 to come to undergo spiritual training or cultivate oneself spiritually 오다 vs 온다 온다 is a narrative present form of 오다 -ㄴ다 is a declarative (narrative) present form used for news, writings, presentations, or narration. Hope it helps you!

Long story short, -요 is not a shortened form of 있어요. -(어/아)요 Adding -요 to the ends of the sentences make them more formal, honorific way which is called 존댓말. In contrast, Not adding -요 is very informal, which called 반말, only be used with friends or people younger than you. For example, '한국어를 공부하고 있어요' is more polite way of saying '한국어를 공부하고 있어'. FYI, -고요 is a completely different grammar. It's a 존댓말 (honorific) of -고 -고(요) is used when you want to add more information or connect two ideas. For example, 저는 한국어를 공부하고(요), 일본어도 공부해요. (I study Korean, and also study Japanese.)

돌아오면 전화주세요. Please give me a call when you come back. 돌아오다 to come back -면 if/when 전화 a phone call/a telephone 전화주다 to give a call -(으)세요 (please) an honorific ending which you can use when you ask/request something or give suggestions

A: 이 반찬은 입맛에 맞으세요? (Good!) B: 네, 딱 맞아요. 밥을 2그릇→두 그릇 더 먹을 정도→정도로 맛있어요. 딱 맞다 vs 잘 맞다 vs 딱 잘 맞다 In my opinion, '딱 맞다' somehow sounds like somthing fits(suits) perfectly in size. When we talk about personal taste using the expression '입맛에 맞다', '잘 맞다' (it suits well one's taste) or '잘 안 맞다'(it doesn't suit well one's taste) sounds natural to me. However, 딱 잘 맞다 can be also used when something just perfectly suits one's taste. In this case, 딱 is an adverb intensifying 잘. 2그릇 vs 두 그릇 In formal writing, it's better to use 한글 instead of 숫자 예) 2시→두 시/ 1번째 → 첫 번째 -ㄹ 정도로 This describes an action or a state by expressing the extent or degree. 예) 눈물이 날 정도로 아팠어. I was so sick that I almost cried.

Hope it helps you!:)

책의 질문: 여러분은 도서관에 어떤 시설이 있었으면 좋겠습니까?

제 대답: 아직 도서관에 간 적이 없지만 곧바로 곧 가 보고 싶습니다. 도서관에 맛있는 카페를 맛있는 음식을 파는 까페가 가지면 있으면 좋겠습니다. 공부 휴식기 쉬는 시간 동안 음료도 마시고 간식도 먹기가 좋은 것을 좋을 것 같습니다.

곧바로 right away; immediately 
곧 soon
쉬는 시간 a breaktime
-(으)ㄹ 것 같다 be likely; it seems that