✔ 最佳答案
甘係因為你而家做既係passive voice.
即係可能原先既句子係:
The author divides this book into 3 parts.
(Subject) (verb) (object)
而家你就將 'the book' 呢個obj 擺前面, 省略/固意隱藏左'the author':
This book is divided into 3 parts (by the author).
同樣地,,'This part is used to describe Peter.' 原來既句子係:
He uses this part to describe Peter.
(S) (V) (O)
因為用左passive voice,,
所以個verb要轉做past participle. ^^
2010-09-02 01:32:03 補充：
Hello! 首先，The author 係一個人，好似he/she/it甘，所以，verb當然要加s。
Active voice:
I/you/we/they + (verb)
He/she/it + (verb)s/es
Passive voice:
I + am + (past participle)
You/we/they + are + (p.p.)
He/she/it + is + (p.p.)
2010-09-02 01:43:11 補充：
其實，有時候現在式同現在進行式並吾係真係分得甘清楚既，意思有時可以差吾多既。用番去洗手間個例子：
He goes to the toilet.
直接翻譯過泥即係 - 他去洗手間。
但其實當中意思可以有以下三個：
1）他剛剛去了洗手間。
2）他現在去了洗手間。
3）他正在去洗手間。
呢三句都指出「他」係去左洗手間，意思其實冇咩大分別，同樣話俾人知佢去左洗手間，吾喺到。所以，英文可以用上面果句，又或者
- He is going to the toilet.
- He has gone to the toilet.
- He is in the toilet.
2010-09-02 01:59:52 補充：
結論係你吾需要諗得太複雜，只要自己用得自然、表達到你想講既意思就可以嫁啦，並無絕對既岩定係錯，因為同一個意思有時都可以有吾同既寫法，又或吾同既寫法所表達出泥既意思都大同小異=]
至於The plane flies at 1pm. 呢個係現在式，但甘係因為佢指緊一件一定會發生既事，即係一個事實：飛機會在下午一點起飛。就好似: The sun rises in the east.
2010-09-02 02:04:17 補充：
而The book is devided into 3 parts. 呢個同樣係現在式，你都可以話甘係因為呢個係一個事實，係吾會改變既。就好似：This pen is used to highlight the important points.
希望可以解答到你啦！加油丫，你做多d grammar exercises就可以幫到你嫁啦！^^
