精选优质文档-倾情为你奉上Unit4 I used to be afraid of the dark一、知识点总结：1. used to do sth. 过去常常做某事否定形式：didnt use to do sth. / used not to do sth.如：He used to play football after school. 放学后他过去常常踢足球。 Did he use to play football? Yes, I did. No, I didnt. He didnt use to smoke. 他过去不吸烟。4. be interested in sth. 对感兴趣be interested in doing sth. 对做感兴趣 如：He is interested in math, but he isnt interested in speaking English. 他对数学感兴趣，但是他对说英语不感兴趣。8. 害怕 be terrified
