As you know that “Have to…” is high frequency pattern you need to know. There are two way to say this in Korean “- (해)야 되다/ (hae)ya dae da or ~(해)야 하다/(hae)ya ha da. I personally hear 되다 much more than 하다, but there is nothing wrong using 하다.   Please read examples below to understand how to use it.

I have to go now/ 지금 가야 돼요/gi gum ga ya dae yo.

To go/가다 ->가야

You have to come tomorrow/ 내일 와야 돼요. Nae il wa ya dae yo.

To come/오다 ->와야

I have to work early tomorrow/ 내일 일찍 일해야 돼요/ nae il il jjic wa ya dae yo.

To work/일하다 -> 일해야

Do you have to leave now?/ 지금 가야 돼요?/ji gum ga ya dae yo?

To leave/떠나다or가다

Do you have to make dinner? 저녁 만들어야 돼요?/jeo neok man deul eo ya dae yo?

To make/만들다

Please watch video and listen how to pronounce. Let me know if you have any sentences you want to make by facebook message.