-도록 하다

Please do..., Be sure to..., Let's...

Explanation

This expression is used to instruct or suggest a course of action to someone.

It is stronger than -아/어보세요 and is used when a person wants to give advice or make a suggestion a bit more softly than what can be expressed using the form -(으)세요.

Details

1. This expression is only used in imperative and propositive sentences. Thus, it cannot be preceded by -아/어서 to express a reason in the same sentence.

기침이 심해서 약을 먹도록 하세요. ✕
→기침이 심하니까 약을 먹도록 하세요. ✓

2. When instructed to do something in this form, the hearer can answer using the similar form -도록 하겠습니다 meaning that he or she will do the action being requested.

가: 기말시험을 잘 봐야 진급할 수 있으니까 열심히 공부하도록 하세요.
You have to do well on your final exams to advance to the next grade, so please
study hard.
나: 네, 열심히 공부하도록 하겠습니다.
Okay, I
will study hard.

Examples
<span class="speaker-a">가:</span> 감기에 걸려서 열이 나고 머리도 아파요.<br><br><span class="speaker-b">나:</span> 약을 먹고 나서 며칠 동안 푹 쉬<span class='focus'>도록 하세요.</span>
A: I have a fever and (resulting) headache because I caught a cold. B: Please take some medicine, and then get some good rest for a few days.
<span class="speaker-a">가:</span> 약속 시간이 언제라고 하셨지요?<br><br><span class="speaker-b">나:</span> 다음 주 금요일 2시예요. 중요한 약속이니까 잊<span class='focus'>지 말도록 하세요.</span>
A: When did you say the appointment was? B: Next Friday at 2 o'clock. It's an important appointment, so please don't forget about it.
건강에 안 좋으니까 담배를 끊<span class='focus'>도록 하세요.</span>
Please stop smoking because it's not good for your health.

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