I have finished my homework. 否定句:主语+haven’t ( have not) +过去分词…
主语+hasn’t ( has not ) +过去分词... I haven’t finished my homework.
疑问句:Have / Has+主语+过去分词...? Have you finished your homework?
B. yet
C. ever
D. still
考查现在完成时标志词。句意：他曾去过上海吗？ 由题目可知为现在完成时。根据句意“曾经”， 选用ever。
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【典例5】Have you met Mr Li ______？
A. just
B. ago
C. before D. a moment ago
考查现在完成时标志词。句意：你以前见过李先生 吗？ago用于一般过去时，just用于句中，答案只能 选C。
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易错点1 现在完成时常见标志词辨析
ever用于疑问句，意为“曾经”，位于句中 Have you ever eaten fish?
never含否定意义，意为“从不”，位于句中 I have never eaten fish.
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易错点1 现在完成时常见标志词辨析
just多用于肯定句， 意为“刚刚”，位于句中 I have just had my lunch.
B. still
C. already
D. yet
考查现在完成时标志词。句意：我还没有决定什么 时候去看我爷爷。never，still仅用于句中，already 用于肯定句，yet用于否定句、疑问句，故答案选D。
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【典例4】Has he _______ been to Shanghai?
A. already
考查现在完成时标志词。题1中，15 days为时间段， 选用for。题2、3中， 7 o’clock和1974为时间点，选 用since。
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【典例2】My parents ________Nanjing twice.
A. have gone to B. have been to
C. have been in
My father has gone to Shanghai for a meeting. （去了尚未回来）
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【典例1】用since/for填空 1. My aunt has lived in Australia___fo_r___15 days. 2. Margaret is in her office. She has been there_s_in_c_e_7 o'clock. 3. India has been an independent country___s_i_n_ce__1974.
初中英语仁爱版九年级上册
语法专项课件 （现在完成时2）
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现在完成时三大用法
现在完成时三大用法： 1.表示到现在为止已经完成或刚刚完成的动作。 2.一件发生在过去的事情对现在产生影响。 3.一个动作开始于过去，并持续到现在（也许还将 持续下去）。
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现在完成时结构回顾
结构
肯定句：主语 + have/ has + 过去分词+...
D. are in
考查现在完成时。句意：我父母去过南京两次。 have gone to去了尚未回来；have been to去过已经 回来，锁定题眼twice，只能选择答案B。
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【典例3】I haven’t decided when to visit my grandpa ______.
A. never
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before用于所有句式， 意为“……之前”，位于句末
She hasn’t seen you before.
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易错点2 since/for用法辨析
since
since+时间点 He has lived in China since 1992.
since+ 时间段+ ago John has been a football player since 3 years ago.
since+ 从句（一般过去时） Tom has lived in America since he was a little child.
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易错点2 since/for用法辨析
for
for+ 时间段
He has kept the book for 2 weeks.
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易错点3 have been to/have gone to辨析
have gone to
去某地了，说话 时某人不在现场， 常用于第三人称。
去过某地已经回来， 可用于任何人称。 常与once, twice, three times, ever, never 等连用。
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易错点3 have been to/havБайду номын сангаас gone to辨析
I have been to Beijing for three times. （去过已回来）
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易错点1 现在完成时常见标志词辨析
already一般用于肯定句， 意为“已经”，句中句末均可 Tom has already finished his homework.
yet一般用于否定句和疑问句， 意为“已经” ，句中句末均可 Tom hasn’t finished his homework yet.