1. English: A stress-timed language
英文是一個重音決定音節長短的語言(stress-timed language)，中文是每個音節幾乎一樣長的語言(syllable-timed language)，用中文的念法唸英文，就會聽起來不道地，且聽力也不會進步。
參考影片：

English: A Stress-Timed Language
http://rachelsenglish.com/english-stress-timed-language/　

Syllable-Timed vs. Stress-Timed Languages

https://youtu.be/sUMM5eCvi8w?t=2m8s

2. stress, rhythm, and intonation

2.1 重音 (stress)：重音節語調較高、音節較長、聲音較大，非重音節語調較低、音節較短、聲音較小。
－重音節及非重音節之間的變化稱為rhythm
－語調高低變化稱為intonation

字詞重音(word stress)：分為重音節、次重音節、非重音節。重音節強化，非重音節弱化，次重音節介於中間。

例：INteresting, ENglish, LIterature
語句重音(sentence stress)：
　　內容詞彙(content words)：動詞、名詞、副詞、否定詞、疑問詞、感嘆詞
　　功能詞彙(function words)：冠詞、連接詞、介系詞、代名詞、助動詞
語句的重音：內容詞彙的重音節強化，內容詞彙的非重音節及功能詞彙弱化(reduction)，聲音常結合、連接、改變。
例：Can I HAVE a BIT of EGG?

參考影片：
introduction to stress
http://rachelsenglish.com/intro-word-stress/
Function Words – Pronunciation + Intonation/Word Stress
http://rachelsenglish.com/function-words-pronunciation-intonationword-stress/

key concepts:
stress
rhythm
intontion
content words
function words

更多參考影片(review)：

The De-Stressed Schwa Vowel Sound: Part 1(within words)

http://www.elementalenglish.com/de-stressed-schwa-vowel-english-pronunciation-lesson

The De-Stressed Schwa Vowel Sound: Part 2(across words)

http://www.elementalenglish.com/%C9%99-the-de-stressed-schwa-vowel-sound-part-2-english-pronunciation-lesson/

Stress and Rhythm in English: A Quick Overview

http://www.elementalenglish.com/stress-and-rhythm-english-pronunciation-overview/

Stress and Rhythm in American English Pronunciation

http://www.elementalenglish.com/rhythm-in-speech/