~느라(고) We can use the expression V+느라(고) to explain that because of (do)ing V…, and is generally followed by a second verb. Typically the clause following V+느라고 is negative as in the following examples. Examples. 급히 오느라(고) 깜빡 잊어 버렸어요 Because I was quickly coming, I completely forgot 옷을 많이 사느라(고) 돈을 다 섰어요 Since I bought lots of clothes, I spent all my money 텔레비전을 보느라(고) 초인종을 못 들었어요 Because I was watching TV, I didn’t hear the doorbell ~도록 You can place ~도록 after adjectives or verbs to have the meaning of “in order to.” For example: 아침에 일찍 일어나도록 어젯밤에 일찍 잤어요 = I went to bed early last night for the purpose of (in order to) get up early in the morning Notice that this sentence could also be said as: 아침에 일찍 일어나기 위해 어젯밤에 일찍 잤어요 = I went to bed early last night to get up early tomorrow Another example: 버스를 놓치지 않도록 정류장으로 뛰었어요 = I ran to the bus stop in order to (so that I would) not miss the bus

First of all, thank you for your question. 도록 (link-ending) to indicate that the event in the previous section is the purpose, result, method, degree of the situation of the subsequent event. 느라[≒느라고] (link-ending) to indicate that the event in the previous section is the purpose or cause of the subsequent event. You asked about the difference between 도록 and 느라, and in the case of 느라, there was a negative result or a negative feeling. So the answer is 도록. Have a nice day~

안녕하세요^^ 깨지 않게 = 깨지 않도록 앞의 나온 말의 목적/결과/방식 등을 나타내고 서로 비슷한 의미로 사용합니다. 예) 다음 날 지각하지 않게/않도록 일찍 자세요. 감기에 걸리지 않게/않도록 손을 자주 씻으세요. 한국어를 까먹지 않게/않도록 자주 사용하세요. -느라 -다 -> 이 표현은 목적이나 원인을 표현할 때 써요. 예) 공부하느라 늦게 잤다. 친구를 만나느라 약속을 깜빡 잊었어요. 게임을 하느라 숙제를 못 했어요. 도움이 되길 바라요. 이해가 안 되면 메시지 보내세요^ㅜ^ㅋ화이팅!