...真正的主詞可能是一個單字、一個片語、或一個子句。 It is good for you to study. = To study is good for you. It is good for you...
They say that jogging is good for your health. 句中的They 是主要子句的主詞 (S.) , say 是主要子句的動詞...
good for you 有 "稱贊", "認可" 某人的意思 example: A: I won the jackpot! 我中頭彩了! B: Good for you! 好棒喔! (我為你感到高興)