美式英语正音训练第92期:第8章 练习3(在线收听

   Exercise 8-3: Bit or Beat?

  We've discussed intonation in terms of new information, contrast, opinion, and negatives.
  As you heard on p. 3, Americans tend to stretch out certain one-syllable words but which ones?
  The answer is simple
  when a single syllable word ends in an unvoiced consonant, the vowel is on a single stairstep
  short and sharp.
  When the word ends in a voiced consonant, or a vowel, the vowel is on a double stairstep. (For an explanation of voiced and unvoiced consonants, see page 62.
  You can also think of this in terms of musical notes.
  Here you are going to compare the four words
  bit, bid, beat, and bead.
  Once you can distinguish these four,
  all of the rest are easy.
  Repeat. bit, bid, beat, bead.
  原文地址:http://www.tingroom.com/lesson/mszyxl/333496.html