現(xiàn)在完成時 1.構(gòu)成 have/has + 過去分詞（done） 通常使用現(xiàn)在完成時的幾種情況 （1）表示過去發(fā)生的某一動作對現(xiàn)在造成的結(jié)果或影響。

　　The disappearence of Justin has made Kelly very unhappy. （2） 表示動作從過去開始，持續(xù)到現(xiàn)在。 Justin has lived in Dover since he was born. （3）表示動作的確切時間不明確或不重要

　　The boy has already come home. (4) 表示剛結(jié)束的動作

　　The police have just finished searching Justin’s home. (5) 表示反復(fù)發(fā)生的動作

　　Some villagers say that they have seen UFOs many times. 常與現(xiàn)在完成時連用的時間狀語 (1). 情況 (1)(3)(4)

　　already, yet, ever, just, recently, lately, never, before(adv.) ①The boy has already/just got home. ②I haven’t heard from him

　　yet/recently/lately. ③I have seen the old man somewhere before. (2). 情況 (2) since/for I have lived in Beijing since 2000.

　　since I arrived here.

　　for 5 years. (3). 情況 (5) times, recently, lately Some villagers say that they have seen UFOs many times/recently/lately. 現(xiàn)在完成進(jìn)行時 1.構(gòu)成 have/has + been + 現(xiàn)在分詞（doing）

　　通常使用現(xiàn)在完成進(jìn)行時的幾種情況 (1) 表示過去開始的動作一直延續(xù)到現(xiàn)在并仍在繼續(xù)之中

　　She has been talking to me since she saw me. (2) 表示過去開始的動作剛結(jié)束并在某種情況下與現(xiàn)在有關(guān)聯(lián)

　　—Sorry I am late. Have you been waiting long? —Yes. I have been waiting for an hour.

　　現(xiàn)在完成時與現(xiàn)在完成進(jìn)行時的區(qū)別 1.現(xiàn)在完成時與現(xiàn)在完成進(jìn)行時都表示動作從過去開始，但現(xiàn)在完成時表示事件或動作剛結(jié)束，而現(xiàn)在完成進(jìn)行時則強(qiáng)調(diào)動作仍在繼續(xù) I have read a book. I have been reading a book.

　　2.現(xiàn)在完成時可表示反復(fù)發(fā)生的動作，提問時用how many times。而現(xiàn)在完成進(jìn)行時則表示持續(xù)的、不間斷的動作，提問時用how long I have visited Egypt twice this month. How many times have you visited Egypt?

　　I have been visiting Egypt for two months. How long have you visited Egypt? 3.現(xiàn)在完成時可以用持續(xù)性動詞和短暫性動詞作謂語，

　　而現(xiàn)在完成進(jìn)行時則只能用持續(xù)性動詞。

　　I have done my homework.

　　I have finished my homework.

　　I have been doing my homework.

　　I have been finishing my homework

　　√ √ √? 簡而言之： ★短暫性動詞 不可以用于現(xiàn)在完成進(jìn)行時， 只能用于現(xiàn)在完成時 4.現(xiàn)在完成時的句子中可以用像never、yet、already和ever等作時間狀語，而現(xiàn)在完成進(jìn)行時的句子中則不可以用這樣的詞 I have already been to Beijing. I have never been to Beijing. I haven’t been to Beijing yet.

　　現(xiàn)在完成時 1.構(gòu)成 have/has + 過去分詞（done） 通常使用現(xiàn)在完成時的幾種情況 （1）表示過去發(fā)生的某一動作對現(xiàn)在造成的結(jié)果或影響。

　　The disappearence of Justin has made Kelly very unhappy. （2） 表示動作從過去開始，持續(xù)到現(xiàn)在。 Justin has lived in Dover since he was born. （3）表示動作的確切時間不明確或不重要

　　The boy has already come home. (4) 表示剛結(jié)束的動作

　　The police have just finished searching Justin’s home. (5) 表示反復(fù)發(fā)生的動作

　　Some villagers say that they have seen UFOs many times. 常與現(xiàn)在完成時連用的時間狀語 (1). 情況 (1)(3)(4)

　　already, yet, ever, just, recently, lately, never, before(adv.) ①The boy has already/just got home. ②I haven’t heard from him

　　yet/recently/lately. ③I have seen the old man somewhere before. (2). 情況 (2) since/for I have lived in Beijing since 2000.

　　since I arrived here.

　　for 5 years. (3). 情況 (5) times, recently, lately Some villagers say that they have seen UFOs many times/recently/lately. 現(xiàn)在完成進(jìn)行時 1.構(gòu)成 have/has + been + 現(xiàn)在分詞（doing）

　　通常使用現(xiàn)在完成進(jìn)行時的幾種情況 (1) 表示過去開始的動作一直延續(xù)到現(xiàn)在并仍在繼續(xù)之中

　　She has been talking to me since she saw me. (2) 表示過去開始的動作剛結(jié)束并在某種情況下與現(xiàn)在有關(guān)聯(lián)

　　—Sorry I am late. Have you been waiting long? —Yes. I have been waiting for an hour.

　　現(xiàn)在完成時與現(xiàn)在完成進(jìn)行時的區(qū)別 1.現(xiàn)在完成時與現(xiàn)在完成進(jìn)行時都表示動作從過去開始，但現(xiàn)在完成時表示事件或動作剛結(jié)束，而現(xiàn)在完成進(jìn)行時則強(qiáng)調(diào)動作仍在繼續(xù) I have read a book. I have been reading a book.

　　2.現(xiàn)在完成時可表示反復(fù)發(fā)生的動作，提問時用how many times。而現(xiàn)在完成進(jìn)行時則表示持續(xù)的、不間斷的動作，提問時用how long I have visited Egypt twice this month. How many times have you visited Egypt?

　　I have been visiting Egypt for two months. How long have you visited Egypt? 3.現(xiàn)在完成時可以用持續(xù)性動詞和短暫性動詞作謂語，

　　而現(xiàn)在完成進(jìn)行時則只能用持續(xù)性動詞。

　　I have done my homework.

　　I have finished my homework.

　　I have been doing my homework.

　　I have been finishing my homework

　　√ √ √? 簡而言之： ★短暫性動詞 不可以用于現(xiàn)在完成進(jìn)行時， 只能用于現(xiàn)在完成時 4.現(xiàn)在完成時的句子中可以用像never、yet、already和ever等作時間狀語，而現(xiàn)在完成進(jìn)行時的句子中則不可以用這樣的詞 I have already been to Beijing. I have never been to Beijing. I haven’t been to Beijing yet.