1.辅音按发音时声带的振动模式,可以分为清辅音和浊辅音两大类。发音时声带不震动、送气的叫清辅音;发音时声带震动、不送气的叫浊辅音。
2.规则动词词尾加-ed有三种读音:
a. 在清辅音后读作[t]。如:asked, helped, watched, stopped
b. 在浊辅音和元音后读作[d]。如:enjoyed, studied, moved, called
c. 在t / d后读作[id]。如:wanted, needed
3.如果 辅音n 后 跟元音 如 单词 need [ni:d] nice[nais] 舌尖抵上齿龈,读“呢”的音.n后跟 辅音 如fancy[fænsi] invention[invenSn] thankyou [thænkju]让舌头平放,不接触上齿龈 ,直接从鼻腔里发 “嗯” 的音 .
4.参考
http://zhidao.baidu.com/question/90975773.html?si=1(1) th位于词首时,可以从词性上判别其应有的读音。在名词、动词、形容词和数词中th发清辅音。如:thing, theatre, thunder, thermos, Thursday, theory, theme, throat, thread, think, thank, thrive, thicken, thirteen, thirty, third, thousand, thick, thirsty, thoughtful, thorough 在代词和一些功能词中th发浊辅音.如: them, their, theirs, there, the, than, then, though, thus, therefore, they。只有介词through是个例外。
(2) th位于词尾(或音节之尾)时,其读音多数是清辅音,如:bath, breath, tooth, 等。只有在少数单词中,如:with, smooth 中读浊音。
(3) th在词中并且后面接er时,或者最后一个字母是不发音的e时,通常也发浊辅音。例如:feather, weather, whether, leather, further, father, bathe, breathe, southern, northern, either等。在其他情况下发清辅音。例如:author, faithful, method, nothing, anything, healthy, wealthy。
5.-s在“清音”之后发[s],在“浊音”之后发[z]。