This is the 2093rd most frequent Korean word.
어머니는
"어머니는" means "mother is" or "as for mother" in English.
'어머니는' in this sentence functions as the subject performing the ongoing action of preparing dinner.
어머니는 저녁 준비를 하고 계십니다.
Mother is preparing dinner.
In this sentence, '어머니는' serves as the subject, emphasizing that the action of going to the market today is performed by the mother.
어머니는 오늘 시장에 갔습니다.
Mother went to the market today.
Here, '어머니는' highlights the subject performing the act of loving and shows her habitual actions.