English pronounciation

Pronounciation of  "ed":

 pronounce as " t ":  p, k, s,, sh, ch.  Examples: asked, distinguished 
 
pronounce as "d" :  b, g, z , m, n, l, r, , w, vowels sounds.  Examples:  robbed, seized, stayed

Some words' 字母 b不發聲, examples:

debt : pronounce as  det.

subtle: pronounce as suttle

Some words' w不發音", examples:

Greenwich， pronounce as grennich.
University of Warwick,  Warwick pronounce as warrick.

The examples above were provided by 曾鈺成.

The following was quoted from an article written by曾鈺成:

"讀音跟拼法不一致，問題出自英文頗複雜的演變過程。許多字的拼法源於拉丁文，但讀音受法文影響。1066年，法國諾曼第公爵威廉（William, Duke of Normandy）征服了英格蘭。其後300年，法文成為英國上層社會的通用語言。法文的影響，在現代英文到處可見。"

Source:  go to this website for details english.mingpao.com/mp3_01.htm