請問have/has+pp同had+pp點分？

have / has+pp 係用於present perfect tense

had+係用於past perfect tense



present perfect tense （現在完成式）

1.過去發生的事情，過去發生的動作，但郤不是 Past Tenses！我們可以用上的時間副詞，就只有 "Already"，"Just"，"Yet"，"Since 1999"…etc。而不可以霸佔 Past Tenses 的時間副詞來用啊，如：Yesterday, Last week, three years ago…etc。

2. 當說及一些事件發生於以前，並繼續進行至現在
I have lived in this house for years／since 1992.

3. 當強調一個動作我們做了多少次或發生次數
He has broken his arm four times before.

4.我們會用 Present Perfect Tense 來表達一個較長久，永恆的事情


Past Perfect Tense （過去完成式）

當我們想表達一個比 Simple Past Tense 更早發生的動作時，就會用上 Past Perfect Tense

這個 Past Perfect Tense 與 Present Perfect Tense 雖然名字很相似，但是用法卻有一點兒不同。Past Perfect Tense 不需要像 Present Perfect Tense 般注意什麼 "有沒有準確時間"，只要在相比下較 Simple Past Tense 早，便可以交給它去辦了。

1. 當一個動作於另一個動作後 "隨即發生"，我們就會兩個動作都同時用 Simple Past Tense，以表達它們迫切性。不過，這一個用法一般都較少人會注意。

E.g.：When the thief saw the policeman, he ran away.


2. 當一句 clause 以 "Before, After, Until…etc" 這些 Conjunction（連接詞）作開頭時，我們就可以用 Past Perfect Tense 或 Simple Past Tense，隨你喜歡。

E.g.：After she took/had taken a shower, she started to do her homework.


資料來自:http://www.crazyhill.com/hung/english/tense.htm

希望幫到你

~~~have/has+pp~~~
由以前至而家一直有做既事 or 而家講一d已經完成既事.
例: I have played the piano since 2000. [我由 2000 年至而家都彈琴]
例: Ann has not finished her homework yet. [Ann 到而家都未做好功課]
例: Ben has finished his dinner already. [Ben 已經食左晚餐]

~~~had+pp~~~
係某段時間以前一直有做既事 or 以前講一d已經完成既事.
例: Helen went to school after she HAD HAD her breakfast. [Helen 食左早餐之後返學, 返學都係過去既事]
例: Beatles HAD BEEN very popular in 1960s. [披頭四o係60年代 (一直) 好出名]

另外, had+pp亦會o係使用 reported speech 時用到.
例: Irene said, I HAVE BEEN to Japan. 由直述句轉做轉述句時會變左做 Irene said that she HAD BEEN to Japan.

想容易分到佢地, 你可以試下畫個 time line (時間線), 或者你既老師可以幫到你.