"Though"实际上只能用作连词和副词。
作为连词,"though"用来引导一个让步状语从句,表示对前面所说的情况的让步或反驳,例如:
He is very busy, though he always makes time for his family.
作为副词,"though"在句子中起到修饰、限制或补充说明的作用,常用于结尾位置,例如:
She didn't complain, though she was tired.
请注意,"though"作为连词和副词时,其含义和用法有所不同。