Tom usedn't to drink.和Tom didn't use to drink有什么区别?

问题描述:

Tom usedn't to drink.和Tom didn't use to drink有什么区别?

Tom usedn't to drink.
Tom过去不常喝饮料 强调 喝饮料
Tom didn't use to drink
Tom过去不常喝饮料 强调过去不常常