英文….…請請詳細解釋..

+ing
1. 當要講一件正在進行o既事時：is/am/are + v+ing
e.g. I am answering your question.
2. v+ing 作名詞用，稱為gerund
e.g. Swimming is a good sport.

past tenSe
已發生o既事，尤其是想講門係幾時發生時，用past tenSe
e.g. I saw your question 10 minutes ago.

past perfect tenSe
都係以前o既事，但有兩件，一先一後發生，而你想交代兩件事o既時序關係時用。
10pm - I saw your question.
9:30pm - I had my dinner.
==> When I saw your question, I HAD HAD my dinner.
(v)+(past participle)

只能簡單答，要充份掌握，真係要做ｄ練習先得呀同學仔。