弱读三大原则
一,弱读成/ə/音:这是最重要的原则,大部分的元音弱读都可以弱读成/ə/音。
二,省略:基本上所有h开头的单词在句子中弱读时都可以把h发音省略省略元音/f/
三,长元音变短元音:如/i:/ ->/i/,/u:/ -> /u/
说完了理论,最重要的就是实际使用了。下面是一些常用单词在句子中的弱读形式。
A. me we she 
这类原来是长元音结尾的,弱读都变成短元音
me /miː/ ->/mi/,we /wiː/ ->/wi/,she/ʃiː/ ->/ʃi/
B.冠词
1、a
这个单词弱读时,基本是感觉嘴间一阵风一带而过的感觉。举例:a /ə/ Have a nice day
2、an
这个单词,一般老师教的是重读形式,为/æn/。但它在句子中的实际发音是/ən/。举例:an apple a day He is an interesting person.
3、the
这个单词在辅音前,发音为/ðə/ ,举例:the letter 在元音前,发音为/ði/,举例:in the end
C.代词
1、he his him: 
这些单词在句首一般保留h发音,但是在句中一般省略h音,将其弱读成/i/ /iz/ /im/。
He /hi/ likes the film. His /hiz/ face is red. Did he /i/ come? I like him /im/. 
2、her: 在辅音前,发音为/ə/ Let her go 在元音前,发音为/ər/ Send her away.
3、us:/ʌs/ 弱读成 /əs/,举例:please help us.
4、your: 重读为/jɔː/在辅音前,弱读为/jə/,举例:do your best 在元音前,弱读为/jər/ ,举例:on your own
5、them:重读为/ðem/,弱读为/ðəm/,举例:I spoke to them.
D.助动词,系动词
1、be:/bi/ Be careful
2、am:/əm/
3、are:辅音前,弱读为/ə/ You are late元音前,弱读为/ər/ we are eager to learn
4、were:辅音前,弱读为/wə/元音前,弱读为/wər/
5、is:/z/ He is here.
6、was:/wəz/
7、do:辅音前,弱读为/də/ where do they live 元音前,弱读为/du/ How do you do
8、does:/dAz/ -> /dəz/
9、have: /həv/ I have met him before /əv/ The visitors have arrived.
10、has:/həz/She has comes/əz/ The place has changed.
11、had: /əd/ He said his son had gone aboard.
12、can:/kən/ Can you help me?
13、could:/kʊd/ ->/kəd/
14、must:很多人一般只会说/mʌst/,语气很重,有种命令和强迫的感觉,但是/məst/就会弱很多。举例:we must /məs/ be careful. You must /məst/ eat it.
15.would:/wʊd/ ->/wəd/ Would you help me?
16.、been:/bi:n/ -> /bin/
17、and:是使用最多的,也是最容易出错的。大多时候,and都不发/ænd/,而是变成:/ən/ rain and snow/n/ bed and breakfast/ənd/ snow and ice
18、as:/æz/ -> /əz/, as soon as possible
19、at:/æt/ -> /ət/ She is at home.
20、but:/bət/ nothing but truth
21.for:/fɔ:(r)/ ->/fə/ Thanks for coming.
22.from:/frɒm/ -> /frəm/ I'm from China.
23.than:/ðæn/ ->/ðən/ better than before
24.of:/ɒv/ ->/əv/ a cup of coffee
25.to: 辅音前,弱读为/tə/ I go to bed at ten 元音前,弱读为/tu/ He has gone to America.
26.that:/ðæt/ ->/ðət/ They said that they would come.
27.some:/sʌm/ -> /s(ə)m/ It will take some time.
28.there:/ðeə/->/ðə/ There are some questions to be answered