这件事情是发生是过去的,属于过去式 再问: 是为什么要用助动词do,而不用are 再答: 这里的afraid 做动词用,所以用did 再问: afraid是形容词啊 再答: 我弄错了 1. used to do sth. 过去常常做某事。(现在不做了)例如: My father used to be a teacher. He used to have long hair. 其否定形式常用didn’t use to 或 used not to。例如: She didn’t use to / used not to wear a skirt. 2. be used to sth / doing sth.习惯于某事或者习惯做某事,其中to为介词,其后跟名词,代词或形容词。例如: I am used to getting up early. I wasn’t used to city life, but now I have got used to living in this city.