现在完成时的用法
一、现在完成时
概念:1.表示过去发生或已经完成的动作对现在造成的影响或结果.
如：I have just posted a letter.
2.表示过去已经开始, 一直延续到现在的动作或状态。
如：I have studied English for two years.
结构：have/has + 过去分词
(当主语是第三人称单数时用has, 其余人称用have 。
过去分词:规则动词的过去分词构成与动词过去式相同; 不规则动词需
要特殊记忆。
否定式: 主语 + haven't/hasn't + 过去分词 + 其他。
疑问式: Have /Has + 主语 + 过去分词 + 其他?
简略答语: Yes, 主语 + have/has.(肯定)No, 主语 +
haven't/hasn't.(否定)
时间状语：recently, lately, since?for?,in the past few years,
etc.
考点一：考查时间状语
例1. He has _______ been to Shanghai , has he ?
Ａ. already Ｂ.never Ｃ.ever Ｄ. still 例2. Have you met Mr Li ______？
Ａ. just Ｂ. ago Ｃ.before Ｄ. a
moment ago 例3. The famous writer _____ one new book in the past two year .
Ａ. is writing Ｂ.was writing Ｃ.wrote Ｄ.has written 例4. —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 例5. Zhao Lan
______already ______in this school for two years . Ａ. was ; studying Ｂ. will ; study
Ｃ. has ; studied Ｄ. are ; studying
例6. We ______ Xiao Li since she was a little girl .
Ａ. know Ｂ. had known Ｃ. have known Ｄ. knew 例7. Harry Potter is a very nice film .I_______ it twice .
Ａ. will see Ｂ. have seen Ｃ. saw Ｄ.see 简析：现在完成时的时间状语常有如下四类：
⑴现在完成时常与already （已经），just （刚刚，正好），ever （曾
经），never （从来，也不；从不），before （以前），yet （仍然）等连用。故例1应选B ；例
2应选C 。