This is the 9683rd most frequent Korean word.
고구마는
"고구마는" means "sweet potato is" or "as for sweet potato" in English.
In this sentence, '고구마는' is the subject indicating that sweet potatoes are being talked about, marked by the topic particle '는'.
고구마는 맛있어요.
Sweet potatoes are delicious.
Here, '고구마는' serves as the subject to discuss the suitability of sweet potatoes when roasted, also marked as the topic.
고구마는 구워 먹으면 좋아요.
Sweet potatoes are good when roasted.
In this example, '고구마는' indicates sweet potatoes as the topic of discussion regarding their health benefits.