Question

15．我過去常常在周末去打籃球，但現(xiàn)在我習(xí)慣于游泳．
Iused to play basketball on weekends，but now Iam used to swimming．

Answer 1

分析 used to play，am used to swimming

解答 答案：used to play，am used to swimming．表示過去常常用used to do sth，打籃球play basketball．習(xí)慣于做某事be used to doing sth，表達(dá)的是客觀事實用一般現(xiàn)在時，主語I，故am，故答案是used to play，am used to swimming

點評 1、used to do sth．
    used to 意為"過去常常"，可看作半助動詞或情態(tài)動詞，其后跟動詞原形，表示過去的習(xí)慣、經(jīng)常發(fā)生的動作或狀態(tài)．如：
    He used to be a teacher in our school．他曾經(jīng)是我們學(xué)校的一位老師．
2、be used to doing sth．
    be used to doing sth．表示"習(xí)慣于做某事"，其中to是介詞，后接名詞或動名詞．如：
    The old man and his wife have been used to living a simple life．這對老夫婦已經(jīng)過慣了簡樸的生活．