闪式美音
当一个单词中的字母t不是首字母，不是重音，并且后面紧跟元音时，会根据美式口音发成接近辅音[d]的辅音。
You really shouldn’t be was(t)ing all this wa(t)er.
There’s no more electrici(t)y in the ci(t)y.
Most people keep wai(t)ing for a big life-changing moment without pu(tt)ing in any efforts.
梅花音
在很多英式英语发[a]或者发[e]的情况下，美式口音会发[æ]；
We need to go to spin class.
He is a natural-born dancer.
We need to treat creativity and literacy with the same status.
卷舌音
卷舌音[r]是美式发音的一大特点；
美式卷舌音的正确发音动作：嘴唇微微噘起，舌头在口腔内向上卷；
美式卷舌音的发音规则：单词中只要有字母r，就需要卷舌。
China is unde(r) a process of u(r)banization.
Thanos is getting bigge(r) and stronge(r).
Jay-Z is a famous rappe(r) on the inte(r)national stage.
口语偷懒现象
wanna=want to；
I want to go home. => I wanna go home.
gonna=going to；
I'm going to go home. => I gonna go home.
gotta=(have) got a / (have) got to；
I have a laptop. I have to go home.
I have got a laptop. I have got to go home.
I've got a laptop. I've got to go home.
I've gotta laptop. I've gotta go home.
I gotta laptop. I gotta go home.
美式英语中存在大量偷懒词，平时请注意积累。
句子中的重音
只要在句子中意思有排他性的单词，我们都需要重读；
实词重读，虚词弱读。实词包括名词、形容词、数词、实义动词、副词、指示代词和反身代词、疑问词；
Michael is a teacher.
My father is tall.
I borrowed four books.
I love you.
He speaks English fluently.
That woman supports herself.
When is the wedding?
I think my English (重读) teacher is very (重读) talented.
Why (重读) would you believe he’s gonna hurt himself (重读)?
I got five (重读) free tickets from that agent (重读) we met last week.
一句正常的话里不可能有太多单词重读，有2到3处重读已经很多了；
具体重读哪些单词要结合具体的情境，不可能百分百没有例外。
意群和断句
意群，就是一群连续的、共同表达一个完整意思的单词；
意群之间要断句，意群之内要连读。
You can establish different quotas / for different categories of users.
I have a long record / of reform and fighting through / on the floor of the United States Senate.
语调和情感色彩
语调的基本单位是意群；
升调往往用来表达不太确定的信息；
平调表示中性的客观陈述；
降调表示结论和强调。
You should rectify your error (降调) / before it is too late (降调).
Whenever I’m in a relationship with anyone (升调), regardless of their position (升调), I’m trying to remember (平调) / that what comes out of them (升调) / is from them (降调).
Ten days ago (升调) , I received (平调) / some pretty harsh criticisms (降调).
美国人语速
演讲视频的语速往往过慢；
英语新闻的语速往往过快；
美国电视脱口秀节目的明星访谈环节是理想的学习素材；
Ellen / Jimmy Fallon / Jimmy kimmel
对字幕进行遮挡并且反复观看才能获得学习效果。
中英文双语字幕素材
听第一遍 遮住双语字幕，用耳朵听对话，看能听懂多少，信息量少于80%的话听第二遍
听第二遍 遮住双语字幕，猜说了什么
听第三遍 遮住英文字幕，看猜的意思是否是对的，猜对了多少，听懂了多少
听第四遍 遮住英文字幕，辨析中文对应的英文是什么，对应的单词是什么，尽可能听出每个单词
听第五遍 遮住英文字幕，猜每个句子，每个单词都猜出来
第六编 观看双语字幕，看是否猜的是对的
记录每次没听懂 没听出来的单词记录下来，一周听至少2次, 视频5分钟合适，2-3个月耳朵基本可以适应语速，然后训练嘴巴，说英语也加快语速，接近美国人语速。