咩叫passive voice,同埋幾時先用,點轉（一定要今日）

active voice 就係我地最初學o既簡單句子中，做動作o既人（subject）、動作（verb）、接受動作o既／物（object）順序排：
I ate the egg.
passive voice 就係將接受動作o既object作為句子開頭。
即變成 The egg was eaten by me.
用法：
１．唔知件事邊個做 e.g. The man is killed!
２．邊個做唔重要／唔講都知 e.g. The fine for smoking has been increased.
３．唔想講邊個做 e.g. Mom, the window has been b roken...
結構一定係：
接受動作o既受詞 + (auxiliary verb - have/can/is/should.. .) + be (is/am/are/was/were/ being/been) + past participle
e.g. X has borrowed the book. => The book has been borrowed.
呢句係 present perfect tense，注意雖然有 past participle，呢句冇變 tense（明明同active voice講緊同一件事，tense點會變？）。唔好再諗轉tense啦！
圖片參考：http://hk.yimg.com/i/icon/16/3.gif

最緊要留意加be呢個部份。be出現係用返be定係其他(is/am/are/was/were/ being/been) ，就睇佢後面o個個動詞。呢句borrowed係past participle，be就用past participle = been。
再一例子，本來係 is doing就變 is being done，is doing係現在進行式，變passive voice後，is being就一樣係現在進行式，本來個doing就乜都唔理轉做過去分詞 done => is being done。搞掂。

We use Passive sentences when it is not important to mention who the doer of the action is.
eg:People destroy the rainforest=Active

The rainforest is destroyed=Passive