我唔係幾明以下呢幾個be ge文法.....

從簡o既答案就係「呢個係 passive voice o既結構」。但咁答你一ｄ得著都冇架喎。
睇一睇以下，係我對 passive voice o既解釋：
= = = = = = = = = = = = = = = = = =
passive voice 就係將接受動作o既object作為句子開頭。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 broken...
結構一定係：
接受動作o既受詞 + (助動詞 auxiliary verb - have/can/is/should...) + be (is/am/are/was/were/being/been) + past participle
主動式句子o既主要動詞（話你知做乜野事o既動詞），會變 past participle，而主要動詞本來o既 tense，就會用左o係 be 度，助動詞 不變。
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。
= = = = = = = = = = = = = = = = = =
再睇返你o個兩句。active voice o既寫法係：
Radio and television all over Australia is * covering this.
We can only notifiy you by air mail post so that we can * verify the address.
* o既位置，就係助動詞同主要動詞之間，即係個 be 加插入去o既地方。第一句主動詞係 ing form，所以 be 變成 being；第二句因為係 present tense，所以就咁用 be。明哂未？
圖片參考：http://tw.yimg.com/i/tw/ugc/rte/smiley_3.gif

因為係passive voice...