现在完成时的构成：过去发生或已经完成的动作对现在造成的影响或结果，或从过去已经开始，持续到现在的动作或状态。 现在完成时是由助动词have,has＋过去分词构成的,过去分词的变化方法和上述的过去式的方法一样，过去分词也有不规则的．You have talked. Have you talked? 时间状语：recently, lately, since…for…,in the past few years, etc. 基本结构：have/has + done 否定形式：have/has + not +done. 一般疑问句：have或has提前 例句：I've written an article. The countryside has changed a lot in the past few years. 1、Both his parents look sad . Maybe they _________what's happened to him .（呼和浩特） Ａ. knew Ｂ. have known Ｃ. must know Ｄ.will know 2、He has _______ been to Shanghai , has he ? Ａ. already Ｂ.never Ｃ.ever Ｄ. Still 3、Have you met Mr Li ______？ Ａ. just Ｂ. ago Ｃ.before Ｄ. a moment ago 4、The famous writer _____ one new book in the past two years . Ａ. is writing Ｂ.was writing Ｃ.wrote Ｄ.has written 5、—Our country ______ a lot so far . —Yes . I hope it will be even ______ . Ａ. has changed ; well Ｂ. changed ; good Ｃ. has changed ; better Ｄ. changed ; better 6、Zhao Lan ______already ______in this school for two years . Ａ. was ; studying Ｂ. will ; study Ｃ. has ; studied Ｄ. are ; studying 7、We ______ Xiao Li since she was a little girl . Ａ. know Ｂ. had known Ｃ. have known Ｄ. knew 8、Harry Potter is a very nice film .I_______ it twice . Ａ. will see Ｂ. have seen Ｃ. saw Ｄ.see 9、—These farmers have been to the United States . —Really ? When _____ there ? Ａ. will they go Ｂ. did they go Ｃ. do they go Ｄ. have they gone 10、—______ you ___ your hork ork yet ? —Yes . I _____ it a moment ago . Ａ. Did ; do ; finished Ｂ. Have ; done ; finished Ｃ. Have ; done ; have finished Ｄ. will ; do ; finish 11、 His father ______ the Party since 1978 . Ａ. joined Ｂ. has joined Ｃ. was in Ｄ. has been in 12、—Do you know him well ? — Sure .We _________ friends since ten years ago . Ａ. were Ｂ. have been Ｃ. have become Ｄ. have made 本文来源：https://www.wddqw.com/doc/40d25d6d011ca300a6c390e0.html